Problems with dark GUI theme on Linux

[luyomi]

I'm using Debian with xfce and compton and the Sable-3.14-Theme, although I fear this problem will also appear with other dark themes.

The scrollbars and the table headers seem to use an own theme, instead of the global one, resulting in white scroll bars on a black window:

http://img.xrmb2.net/images/409484.png

[Zenju]

Fixed, column label font and background color are now retrieved from the system:
[404, Invalid URL: https://freefilesync.org/FreeFileSync_7.3_beta_Debian_8.1_64-bit.tar.gz]