Updated JS translations to be inserted from back-end

Removes old awkward JS translations endpoint.
New system still a little akward in code but not now in process.

Also extracted out page editors into their own files.

Closes #1258

resources/views/pages/edit.blade.php

@@ -10,6 +10,8 @@
 
     <div class="flex-fill flex">
         <form action="{{ $page->getUrl() }}" autocomplete="off" data-page-id="{{ $page->id }}" method="POST" class="flex flex-fill">
+            {{ csrf_field() }}
+
             @if(!isset($isDraft))
                 <input type="hidden" name="_method" value="PUT">
             @endif