Fixed issue #2796 - Image/attachment preview is to small, need to download image and open it locally.

app/assets/javascripts/app/controllers/_application_controller.coffee

@@ -452,6 +452,7 @@ class App.ControllerModal extends App.Controller
   keyboard: true
   large: false
   small: false
+  veryLarge: false
   head: '?'
   autoFocusOnFirstInput: true
   container: null

app/assets/javascripts/app/controllers/ticket_zoom/article_image_view.coffee

@@ -4,7 +4,7 @@ class App.TicketZoomArticleImageView extends App.ControllerModal
   buttonSubmit: 'Download'
   buttonClass: 'btn--success'
   head: ''
-  large: true
+  veryLarge: true
 
   events:
     'submit form':      'submit'