Merge branch 'hotfix/3.2.14' into support/3.2
Correctly assign "col_first" and "col_last" in the image gallery (see #7250)
Fix the `Database::list_fields()` method (see #7277)
Updated the ACE editor to version 1.1.6 (see #7278)
Fix a bug currently occurring in Chrome 38 beta (see #7281)
Fix two issues with the ACE editor (see #7284)
Merge branch 'hotfix/3.2.15' into hotfix/3.3.6

Conflicts:
	assets/contao/js/core.js
	system/config/ace.php
	system/docs/CHANGELOG.md
	system/themes/default/main.css
Update the change log and the vendor libraries
Correctly mark CAPTCHA fields as mandatory (see #7283)