l10n: de.po: translate 11 new messages

Translate 11 new messages came from git.pot update
in 46bc403 (l10n: Update git.pot (11 new, 7 removed
messages)).

Signed-off-by: Ralf Thielow <ralf.thielow@gmail.com>
Acked-by: Thomas Rast <trast@inf.ethz.ch>
l10n: de.po: translate "revision" consistently as "Version"

In the German translation, we have translated "revision"
as both "Revision" and "Version". In the context of version
control, revision has the same meaning as commit, so we don't
need to use both terms. "revision" is now consistently translated
as "Version".

Signed-off-by: Ralf Thielow <ralf.thielow@gmail.com>
l10n: de.po: translate "reset" as "neu setzen"

According to the glossary, "reset" should be
translated as "neu setzen" but in a couple of
messages we've translated it as "zurücksetzen".
This fixes that.

Signed-off-by: Ralf Thielow <ralf.thielow@gmail.com>