Embedded SVG icons in css/js files

Allows removal of hacky /icon endpoint solution.
Fixes PDF exports with WKHTML and allows the icon to show in HTML
exports.

Fixes #796

app/Http/Controllers/HomeController.php

@@ -108,27 +108,6 @@ class HomeController extends Controller
         ]);
     }
 
-    /**
-     * Get an icon via image request.
-     * Can provide a 'color' parameter with hex value to color the icon.
-     * @param $iconName
-     * @param Request $request
-     * @return \Illuminate\Contracts\Routing\ResponseFactory|\Symfony\Component\HttpFoundation\Response
-     */
-    public function getIcon($iconName, Request $request)
-    {
-        $attrs = [];
-        if ($request->filled('color')) {
-            $attrs['fill'] = '#' . $request->get('color');
-        }
-
-        $icon = icon($iconName, $attrs);
-        return response($icon, 200, [
-            'Content-Type' => 'image/svg+xml',
-            'Cache-Control' => 'max-age=3600',
-        ]);
-    }
-
     /**
      * Get custom head HTML, Used in ajax calls to show in editor.
      * @return \Illuminate\Contracts\View\Factory|\Illuminate\View\View