[patch] Enable usage of absolute path for admin js option
|Reported by:||Owned by:||Adrian Holovaty|
|Has patch:||yes||Needs documentation:||no|
|Needs tests:||no||Patch needs improvement:||no|
With this patch if admin.js parameter is used with absolute URL, ADMIN_MEDIA_URL is not added in front of it.
This way we don't need to link additional JS files into ADMIN_MEDIA_URL/js/ directory.