3.5.1

Fixed

• Add a StringUtil class to restore PHP 7 compatibility (see contao/core-bundle#309).
• Fix the Validator::isEmail() method (see contao/core-bundle#313).
• Strip tags before auto-generating aliases (see #7857).
• Correctly encode the URLs in the popup file manager (see #7929).
• Check for the comments module when compiling the news meta fields (see #7901).
• Also sort the newsletter channels alphabetically in the front end (see #7864).
• Disable responsive images in the back end preview (see #7875).
• Overwrite the request string when generating news/event feeds (see #7756).
• Store the static URLs with the cached file (see #7914).
• Correctly check the subfolders in the hasAccess() method (see #7920).
• Updated the countries list (see #7918).
• Respect the notSortable flag in the parent (see #7902).
• Round the maximum upload size to an integer value (see #7880).
• Make the markup minification less aggressive (see #7734).
• Filter the indices in Database::getFieldNames() (see #7869).
• Back-ported two fixes from the upstream versions.