Merge the latest version 2.11 changes
Do not bind `Locale.define()` to the "domready" event (see #5326)
Update all language files
Readd the "access protection" panel to the page root palette (see #5298)
Support `null` as column default value in the DCA (see #5252)
Load the core `autoload.php` files first (see #5261)
Merge remote-tracking branch 'upstream/hotfix/3.0.4' into hotfix/3.0.4
Also check whether the target exists when creating new folders (see #5260)
Preserve the order of multi source fields when exporting a theme (see #5237)
Merge remote-tracking branch 'upstream/hotfix/3.0.4' into hotfix/3.0.4