Add workaround for image caching in fabric js [SCI-2855]

app/assets/javascripts/sitewide/file_preview.js.erb

@@ -18,9 +18,14 @@
     });
   }
 
+<<<<<<< HEAD:app/assets/javascripts/sitewide/file_preview.js.erb
 
    function initImageEditor(data) {
     // var ImageEditor = require('tui-image-editor');
+=======
+  function initImageEditor(data) {
+    var imageEditor;
+>>>>>>> 50ccdbc6... Add workaround for image caching in fabric js [SCI-2855]:app/assets/javascripts/sitewide/file_preview.js
     var blackTheme = {
       'common.bi.image': '',
       'common.bisize.width': '0',
@@ -104,10 +109,9 @@
       'colorpicker.title.color': '#fff'
     };
 
-    var imageEditor = new tui.ImageEditor('#tui-image-editor', {
+    imageEditor = new tui.ImageEditor('#tui-image-editor', {
       includeUI: {
         loadImage: {
-          // path: data['large-preview-url'],
           path: data['download-url'],
           name: data.filename
         },
@@ -146,7 +150,8 @@
         }
       }).done(function() {
         animateSpinner(null, false);
-        imageEditor.clearObjects();
+        imageEditor.destroy();
+        imageEditor = {};
         $('#tui-image-editor').html('');
         $('#fileEditModal').modal('hide');
       });

app/controllers/assets_controller.rb

@@ -50,7 +50,7 @@ class AssetsController < ApplicationController
       'filename' => truncate(@asset.file_file_name,
                              length:
                                Constants::FILENAME_TRUNCATION_LENGTH),
-      'download-url' => download_asset_path(@asset)
+      'download-url' => download_asset_path(@asset, timestamp: Time.now.to_i)
     }
 
     if @asset.is_image?

app/views/shared/_file_edit_modal.html.erb

@@ -1,7 +1,6 @@
 <div id="fileEditModal"
      class="modal modal-file-edit"
      role="dialog"
-     tabindex="-1"
      aria-labelledby="fileEditModal"
      aria-hidden="true"
      data-backdrop="static"