Temporary fix for #4305: Cant preview attached png images on notes;...

Temporary fix for #4305: Cant preview attached png images on notes; attachment.secure_url returns an url which is accessible

app/views/events/event/_note.html.haml

@@ -14,8 +14,8 @@
     - note = event.target
     - if note.attachment.url
       - if note.attachment.image?
-        = link_to note.attachment.url, target: '_blank' do
-          = image_tag note.attachment.url, class: 'note-image-attach'
+        = link_to note.attachment.secure_url, target: '_blank' do
+          = image_tag note.attachment.secure_url, class: 'note-image-attach'
       - else
         = link_to note.attachment.secure_url, target: "_blank", class: 'note-file-attach' do
           %i.icon-paper-clip

app/views/projects/notes/_note.html.haml

@@ -54,8 +54,8 @@
   - if note.attachment.url
     .note-attachment
       - if note.attachment.image?
-        = link_to note.attachment.url, target: '_blank' do
-          = image_tag note.attachment.url, class: 'note-image-attach'
+        = link_to note.attachment.secure_url, target: '_blank' do
+          = image_tag note.attachment.secure_url, class: 'note-image-attach'
       .attachment.pull-right
         = link_to note.attachment.secure_url, target: "_blank" do
           %i.icon-paper-clip