Fixed: Show error message when manual import fails to load

Fixes #2384

src/UI/ManualImport/ErrorView.js

@@ -0,0 +1,5 @@
+var Marionette = require('marionette');
+
+module.exports = Marionette.CompositeView.extend({
+    template : 'ManualImport/ErrorViewTemplate'
+});

src/UI/ManualImport/ErrorViewTemplate.hbs

@@ -0,0 +1 @@
+Unable to load files for manual import. Check logs for more details.

src/UI/ManualImport/ManualImportLayout.js

@@ -4,6 +4,7 @@ var Marionette = require('marionette');
 var Backgrid = require('backgrid');
 var CommandController = require('../Commands/CommandController');
 var EmptyView = require('./EmptyView');
+var ErrorView = require('./ErrorView');
 var SelectFolderView = require('./Folder/SelectFolderView');
 var LoadingView = require('../Shared/LoadingView');
 var ManualImportRow = require('./ManualImportRow');
@@ -122,8 +123,11 @@ module.exports = Marionette.Layout.extend({
     },
 
     _loadCollection : function () {
+        var self = this;
         this.manualImportCollection = new ManualImportCollection({ folder: this.folder, downloadId: this.downloadId });
-        this.manualImportCollection.fetch();
+        this.manualImportCollection.fetch().fail(function () {
+            self.workspace.show(new ErrorView());
+        });
 
         this.listenTo(this.manualImportCollection, 'sync', this._showTable);
         this.listenTo(this.manualImportCollection, 'backgrid:selected', this._updateButtons);
@@ -256,4 +260,4 @@ module.exports = Marionette.Layout.extend({
             hideAfter : 5
         });
     }
-});
+});