Changes since 1.7.7: 947628f
[GENERAL]
- updated header descriptions of all css/xml files
- renamed xml files (to get rid of "_fx57" in file name)
- dropped support for Firefox 57 and 58, use 59 or newer instead
[Buttons]
- (tweak) application/hamburger button popup > hide panel arrow > merged files (dropped Fx57/58 support)
- (tweak) squared button appearance > merged files (dropped Fx57/58 support)