Add a CSS class indicating the number of columns in a gallery (see #7138)
Add the "unlink" button to TinyMCE and fix the picker switch label
Only create one `DcaExtractor` instance per table (see #7324)
Remove the H2 sub-headlines in the back end (see #7248)
Remove more H2 sub-headlines in the back end (see #7248)
Make sure to return integers in `Image::getPixelValue()`
Also round the pixel values in `Image::getPixelValue()`
Make sure to always return the size of an `.svg` image (see #7296)
Correctly style readonly text fields (see #7296)
Use `addImageToTemplate()` in the `ContentHyperlink` class (see #7296)
Do not mark pages as active if there are query parameters (see #7189)
Merge branch develop into feature/picture-element

Conflicts:
	system/modules/core/library/Contao/File.php
	system/modules/core/library/Contao/Image.php
	system/themes/default/main.css
	system/themes/flexible/main.css