fix handling of legacy database.sql multicolumn keys in dca extractor
Add `widget-*` CSS classes to front end form fields (see #7041)
Add an option to export style sheets (see #7049)
Adjust the whitespaces in the `ce_hyperlink*` templates (see #7295)
Consider the values of referenced fields in the back end search (see #4376)
Add the "onundo_callback" (see #7258)
Make sure `TL_USER_CSS` is set in `PageRegular.php` (see #6937)
Add the `sort` flag to the `eval` section of the DCA (see #4072)
Move the mime types array to a configuration file (see #6843)
Add basic SVG support (see #7108)
Handle SVG images in `File::__get('imageSize')`
Add support for SVG images with pixel-based dimensions
Use the "preserveAspectRatio" attribute to emulate image cropping
Make SVG files editable in the file manager
Create SVG thumbnails in the back end and make SVG files editable
Support `pt`, `em` and `%` in addition to `px`
Merge branch 'feature/svg' into develop
Also support SVGZ files (see #7108)
Add the "viewBox" attribute if not present (see #7108)
Use `isImage` instead of `isGdImage`