* feat(lint): add php-cs-fixer for linting
Removing previous CODE_STYLE as it was not enforced anyway and using PER-CS 2.0.
This is not the reformatting commit.
* style: format code according to PER-CS 2.0 with php-cs-fixer
* ci(actions): add lint action
Resolves#1132.
Changes:
1. Add the ability to display only administrators on the page with a list of subscribers
2. Add the ability to hide the fact that the subscriber is an administrator
3. Fix display of large text in the block with the list of administrators
4. Fix display of the number of administrators
This commit allows you to pin groups to the left menu (max 10 groups, only those in which you are the administrator) from the My Groups page. Fixes#186
