Add more Qt preferences

Signed-off-by: Rob Caelers <robc@krandor.org>
Fix break windows layout and add a void pointer.

Signed-off-by: Rob Caelers <robc@krandor.org>
Enable C99 for C files.

Signed-off-by: Rob Caelers <robc@krandor.org>
Update translations.
Merge branch 'next' of github.com:rcaelers/workrave into next

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