#3440220: Fix border on bottom left/right on expand

Added border radius in the bottom right and bottom left of the toolbar-button.

Tested on '3440220-remove-bottom-radius' branch. The button design are fixed according to the design

added 21 commits

• 5d8b14ff...7b9f4c99 - 19 commits from branch project:11.x
• 0bd7d016 - Fix border on bottom left/right on expand
• 6c3d95b4 - CSS Linting fixes

Compare with previous version

closed