title: Svg icon not showing in toast-ui vue image editor
body: <p>I am using <code>vue-cli</code>and <code>toast-ui-vue-image-editor</code>.</p>
  
  <pre><code>// vue.config.js
  const path = require('path')
  let HardSourceWebpackPlugin = require('hard-source-webpack-plugin')
  
  module.exports = {
  
    chainWebpack: config =&gt; {
      config.module
        .rule('svg')
        .use('file-loader')
        .options({
          name: '[name].[ext]',
          outputPath: ''
        })
    }
  </code></pre>
  
  <p>And added these line in Vue compoenent</p>
  
  <pre><code>import 'tui-image-editor/dist/svg/icon-a.svg'
  import 'tui-image-editor/dist/svg/icon-b.svg'
  import 'tui-image-editor/dist/svg/icon-c.svg'
  import 'tui-image-editor/dist/svg/icon-d.svg'
  import { ImageEditor } from '@toast-ui/vue-image-editor'
  </code></pre>
  
  <p>Everything is working but editor's tool Svg icon is not showing. See most bottom section of editor where white square showing instead of icons (undo ,redo, crop etc.)
  <img src="https://user-images.githubusercontent.com/12670763/51656691-edc97f00-1fc3-11e9-8a9a-103fdfa06825.png" alt="image"></p>