I18n: Update translation cs (100%).

220 translated messages.

Transifex (https://www.transifex.com/projects/p/xfce/).
Hardcode the infobar label color (Bug 11100)

The GtkInfoBar hard codes the background color which makes the
label impossible to read with dark themes. This patch hard codes
the label's color so you can read it with any theme.
I18n: Update translation cs (100%).

220 translated messages.

Transifex (https://www.transifex.com/projects/p/xfce/).
I18n: Update translation ru (100%).

220 translated messages.

Transifex (https://www.transifex.com/projects/p/xfce/).