Created attachment 266599 [details]
Steps to reproduce:
1. Change gnome desktop theme to high contrast large print inverse theme.
2. Click the mail account root folder in left table tree.
Mail pane doesn't comply with gnome desktop theme settings.
Mass move to the new theme component.
I believe this is fixed by bug 620467, but I haven't tried it.
Created attachment 551425 [details]
How it looks now
I would say, this bug can be closed. Fixed by bug 640090