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

app/Http/Controllers/HomeController.php

@@ -91,35 +91,6 @@ class HomeController extends Controller
         return view('common.home', $commonData);
     }
 
-    /**
-     * Get a js representation of the current translations
-     * @return \Illuminate\Contracts\Routing\ResponseFactory|\Symfony\Component\HttpFoundation\Response
-     * @throws \Exception
-     */
-    public function getTranslations()
-    {
-        $locale = app()->getLocale();
-        $cacheKey = 'GLOBAL_TRANSLATIONS_' . $locale;
-
-        if (cache()->has($cacheKey) && config('app.env') !== 'development') {
-            $resp = cache($cacheKey);
-        } else {
-            $translations = [
-                // Get only translations which might be used in JS
-                'common' => trans('common'),
-                'components' => trans('components'),
-                'entities' => trans('entities'),
-                'errors' => trans('errors')
-            ];
-            $resp = 'window.translations = ' . json_encode($translations);
-            cache()->put($cacheKey, $resp, 120);
-        }
-
-        return response($resp, 200, [
-            'Content-Type' => 'application/javascript'
-        ]);
-    }
-
     /**
      * Get custom head HTML, Used in ajax calls to show in editor.
      * @return \Illuminate\Contracts\View\Factory|\Illuminate\View\View

app/Providers/AppServiceProvider.php

@@ -39,6 +39,14 @@ class AppServiceProvider extends ServiceProvider
             return "<?php echo icon($expression); ?>";
         });
 
+        Blade::directive('exposeTranslations', function($expression) {
+            return "<?php \$__env->startPush('translations'); ?>" .
+                "<?php foreach({$expression} as \$key): ?>" .
+                '<meta name="translation" key="<?php echo e($key); ?>" value="<?php echo e(trans($key)); ?>">' . "\n" .
+                "<?php endforeach; ?>" .
+                '<?php $__env->stopPush(); ?>';
+        });
+
         // Allow longer string lengths after upgrade to utf8mb4
         Schema::defaultStringLength(191);