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

routes/web.php

@@ -1,6 +1,5 @@
 <?php
 
-Route::get('/translations', 'HomeController@getTranslations');
 Route::get('/robots.txt', 'HomeController@getRobots');
 
 // Authenticated routes...