fix: better icon for quiqqer bricks ckeditor plugin

plugins/quiqqer/quiqqerBricks/plugin.js

@@ -237,7 +237,7 @@
                 label  : editor.lang.quiqqerBricks.button,
                 toolbar: 'insert',
                 command: 'insert-quiqqer-brick',
-                icon   : this.path + 'images/icon.jpg'
+                icon   : this.path + 'images/icon.png'
             });
 
             // save