Progresswidget: lighter background color (#8195)
Progresswidget: lighter background color (#8195)

Should make ticks more visible.
poire-z/koreader,poire-z/koreader,NiLuJe/koreader,NiLuJe/koreader,Frenzie/koreader,Frenzie/koreader,koreader/koreader,koreader/koreader