Merged r9861 from trunk.
Fix: Unable to run unit and functional tests if git binary is not available.
Backported r9858 from trunk.
Merged r9858 from trunk.
Fixed that deleting a project with subtasks may fail (#11185).
Backport r9856 from trunk (#11186)
Traditional Chinese translation updated by ChunChang Lo.
Traditional Chinese translation updated by ChunChang Lo (#11186)
Merged r9853 from trunk (#10688)
fix PDF export tables problems.
Contributed by Jun NAITOH.
fix PDF export tables problems (#10688)