Sync translations with Transifex

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Prepare release and bump version numbers to 1.8.12.0

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Fixed issue #2359: Selected files counter not updated after revert

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>
The show log dialog was only showing the subject.  We would like to also include the description in the white-space as well to give more information.
There is still a known issue with the way that this was done where the head commit ONLY shows the description and does not include the subject (which is the most important part)
Log message subject and body combination tweaks
Fix problem where branch log messages only included the body
Use a single method to build the combined subject and body message