title: How to expand tree node without ajax request?
body: <p>I am using Extjs tree, i got problem with click on nested node ajax request to server, i know this kind of lazy load but my tree is not big, around 35 items so i want request to server time only to collect all tree node and items.
  Any idea?</p>
  
  <p>View:</p>
  
  <pre><code>Ext.define('CRM.view.role.RoleTree' ,{
  extend: 'Ext.tree.Panel',
  alias: 'widget.roleTreeList',
  id:'tree-role-panel',
  split: false,
  autoScroll: true,
  lines: true,
  singleExpand: false,
  store: 'RoleList'
  </code></pre>
  
  <p>})</p>
  
  <p>Store:</p>
  
  <pre><code>Ext.define('CRM.store.RoleList', {
  extend: 'Ext.data.TreeStore',
  storeId: 'RoleTreeStoreId',
  //model: 'CRM.model.RoleList',
  autoLoad: false,
  proxy: {
              type  : 'ajax',
              url   : 'index.php/role/getRoleList',
              async : false,
              reader: {
                  type   : 'json',
                  method : 'POST'
              }
  },
  root:{
      expanded:true,
      text:"Organization",
      leaf:'false',
       id       : '/',
  }
  </code></pre>
  
  <p>})</p>
  
  <p>Json return:</p>
  
  <pre><code>{
  "text": "Organization",
  "id": "role-1",
  "children": [
      {
          "text": "Admin",
          "id": "role-12",
          "expanded": "true",
          "children": [
              {
                  "text": "MSD",
                  "id": "role-23",
                  "children": [
                      {
                          "text": "Customer Care Manager",
                          "id": "role-4",
                          "children": [
                              {
                                  "text": "Customer Care Adviser",
                                  "id": "role-5"
                              }
                          ]
                      },
                      {
                          "text": "Solution Adviser",
                          "id": "role-7"
                      },
                      {
                          "text": "Sales Manager",
                          "id": "role-31",
                          "children": [
                              {
                                  "text": "Solution Sales",
                                  "id": "role-6"
                              },
                              {
                                  "text": "Teritory 01 - Safy",
                                  "id": "role-9",
                                  "children": [
                                      {
                                          "text": "Sales Person 01",
                                          "id": "role-10"
                                      },
                                      {
                                          "text": "Sales Trainee 01",
                                          "id": "role-26"
                                      }
                                  ]
                              },
                              {
                                  "text": "Teritory 3 - Sambo",
                                  "id": "role-11",
                                  "children": [
                                      {
                                          "text": "Sales Person 3",
                                          "id": "role-13"
                                      }
                                  ]
                              },
                              {
                                  "text": "Teritory 4 - Narong",
                                  "id": "role-14",
                                  "children": [
                                      {
                                          "text": "Sales Team 4",
                                          "id": "role-15",
                                          "children": [
                                              {
                                                  "text": "Sales Person 4",
                                                  "id": "role-25"
                                              }
                                          ]
                                      }
                                  ]
                              },
                              {
                                  "text": "branch shv",
                                  "id": "role-16",
                                  "children": [
                                      {
                                          "text": "sales shv",
                                          "id": "role-19"
                                      }
                                  ]
                              },
                              {
                                  "text": "branch btb",
                                  "id": "role-17",
                                  "children": [
                                      {
                                          "text": "sales btb",
                                          "id": "role-20"
                                      }
                                  ]
                              },
                              {
                                  "text": "branch srp",
                                  "id": "role-18",
                                  "children": [
                                      {
                                          "text": "sales srp",
                                          "id": "role-21",
                                          "children": [
                                              {
                                                  "text": "sales person srp",
                                                  "id": "role-28"
                                              }
                                          ]
                                      }
                                  ]
                              },
                              {
                                  "text": "Retention Program",
                                  "id": "role-22",
                                  "children": [
                                      {
                                          "text": "Retention Program Analysist",
                                          "id": "role-24"
                                      }
                                  ]
                              },
                              {
                                  "text": "Sales Trainee",
                                  "id": "role-27"
                              },
                              {
                                  "text": "Enterprise Sales Engineer",
                                  "id": "role-29"
                              },
                              {
                                  "text": "Meas Test",
                                  "id": "role-30"
                              },
                              {
                                  "text": "Teritory 02 - Kol",
                                  "id": "role-32",
                                  "children": [
                                      {
                                          "text": "Sales Person 02",
                                          "id": "role-8"
                                      }
                                  ]
                              }
                          ]
                      }
                  ]
              },
              {
                  "text": "CTO",
                  "id": "role-35",
                  "children": [
                      {
                          "text": "Support Manager",
                          "id": "role-2",
                          "children": [
                              {
                                  "text": "Technical Support Adviser",
                                  "id": "role-3"
                              }
                          ]
                      },
                      {
                          "text": "IT BIlling Product Manager",
                          "id": "role-33",
                          "children": [
                              {
                                  "text": "IT Staff",
                                  "id": "role-34"
                              }
                          ]
                      }
                  ]
              },
              {
                  "text": "Business Consultant",
                  "id": "role-36"
              }
          ]
      }
  ]
  </code></pre>
  
  <p>}</p>