Merge branch 'hotfix/3.1.5'
Merge branch 'release/3.2.0'
Remove `CalendarEventsModel::findBoundaries()` (see #6467)
Fix the `mail_default` templates
Improve the speed and memory footprint of the news archive menu (see #6463)
Correctly assign images to FAQs (see #6465)
Correctly detect UUIDs in the "file" insert tag (see #6472)
Optimize the `FilesModel` queries
Remove the wrong "PHP tidy" requirement (see #6486)
Correctly toggle the mobile/desktop view (see #6227)
Only do the UUID conversion once even if the `Database\Updater` helper methods are called multiple times (see #6481)
Drop the backup field routines
Optionally override the repository tables when importing a template (see #6470)
Remove the index from the `tl_style.selector` field (see #6462)
Update TinyMCE to version 3.5.10 to fix the IE11 issues (see #6479)
Improve the UUID conversion routine (see #6481)
Update the language files
Add missing phpDoc comments in `system/helper/functions.php`
Bump the version number
Merge branch 'hotfix/3.2.1'