Support renaming case sensitively in `DC_Folder` (see #5522)
Always load MooTools in debug mode (see #5518)
Update mediaelement.js to version 2.11.0 (see #5495)
Rename `responsive.css` to `grid.css` (see #5475)
Revert 'Make the article module respond to the `auto_item` parameter (see #4823)'
Mark comments with reply (see #3202)
Store the newsletter subscription confirmation date (see #5200)
Replace CodeMirror with ACE (see #5332)
Remove the MooTools compat layers (will break ACE)
Move the "edit source" button of the template editor to the right
Do not show the upload button in "edit multiple" mode
Add `border-box` to the ACE container
Fix various issues and make the key/value wizard sortable
Remove the `pathconfig.php` file in the install tool if the path does not match (see #5428)
Preserve the file mounts if a user enters a wrong password (see #5529)
Adjust the media player help texts (see #5507)
Add the "modifyFrontendPage" hook (see #4291)
Allow to shorten the calendar day names via CSS (see #5462)
Add more options to the event list module (see #5481)
Add a placeholder attribute to the newsletter subscription templates (see #3408)