Cleanup board/library manager color setting and somewhat support dark themes#9272

Merged

cmaglie merged 3 commits intoarduino:masterfrom

matthijskooijman:manager-colors

Oct 16, 2019

Commits on Oct 1, 2019

Remove unneeded color-setting code in the boards and library manager
matthijskooijman
committed
In the board/library manager, create the description component only once
matthijskooijman
committed
Set foreground color in library/board manager
matthijskooijman
committed