Fix gtk3 progressbar text color
Revert "Workaround for gnumeric frame label"

This reverts commit 5644036ddfd6828d859137f43011957a92e5a366.
change zen-nigra menu style to dark (gtk2)
add Zen-bicolor variant (gtk2)
change zen-nigra menu style to dark (gtk3) and fix minor issue
add Zen-bicolor variant (gtk3)
adjust @dark_text_color for gtk2
Improve radio and check appearance for Zen-nokto (gtk2)
Improve radio and check appearance for Zen-nokto (gtk3)
rename cache folder to arch
Fix bug in scrollbars for epiphany (regression introduced by commit 7928d0f)
Fix gtk3 fallback Mode Panel
Fix insensitive issue for epiphany due to ".menubar *:hover" (regression commit f709ae0)
Adjust gtk3 button insensitive bg color
Adjust xfwm4 titlebar and xfce-headers
updates for v0.12.0