Field initialization runs every time the user hits "Save"

[JonasDoebertin]

The medium editor is being initialized every time the panel content form is saved. This leads to a large amount of unused instances of the editor and plenty of unnecessary toolbar elements and dynamic CSS rules.

We need to modify the below initialization callback in a way that the initialization runs only when the panel JS application is loaded for the first time. Does this make sense?

(function($) {
    $.fn.wysiwygeditorfield = function() {
        WysiwygEditorField.init(this);
    };
})(jQuery);

[JonasDoebertin]

Fixed with e5f3fe6ef061d5bf1805c8d2c581c55cf0518d4f.

The MediumEditor attached to each field now get's destroyed, when a user leaves the view they where created in.