title: How to disable the option to deselect a row on TurboTable component?
body: <p>So I have a table with data that gets populated throughout the use of the application. When a user clicks on a row, the row is highlighted and that row's data is populated beneath the table. I just want to disable the option of the user to deselect a row (this is done by clicking on the row again).</p>
  
  <p>The code: </p>
  
  <pre><code>&lt;p-table #purchaseOrdersList
           [value]="purchaseOrders"
           selectionMode="single"
           [(selection)]="selectedPurchaseOrder"
           (onRowSelect)="onRowSelect($event)"
            &gt;
  
  &lt;ng-template pTemplate="header"&gt;
      &lt;tr&gt;
        &lt;th class="supplier-number-col"&gt;Supplier Number&lt;/th&gt;
        &lt;th class="supplier-name-col"&gt;Supplier Name&lt;/th&gt;
        &lt;th class="supplier-phone-col"&gt;Supplier Phone&lt;/th&gt;
      &lt;/tr&gt;
    &lt;/ng-template&gt;
  
    &lt;ng-template pTemplate="body" let-purchaseOrder&gt;
      &lt;tr [pSelectableRow]="selectedRow"&gt;
        &lt;td&gt;{{purchaseOrder.supplierNumber}}&lt;/td&gt;
        &lt;td&gt;{{purchaseOrder.supplierName}}&lt;/td&gt;
        &lt;td&gt;{{purchaseOrder.supplierPhoneNumber}}&lt;/td&gt;
      &lt;/tr&gt;
    &lt;/ng-template&gt;
  
  &lt;/p-table&gt;
  </code></pre>