Simplified Chinese translation updated by Peng Wang (#7278).
Merged r5500 from trunk.
Czech translation updated by Lubor Nosek.
Czech translation updated by Lubor Nosek (#7390).
Traditional Chinese translation updated by ChunChang Lo (#8170).
Fixes potential test failure.
Merged r4901 from trunk.
Updated basque and czech translations. Contributed by Ales Zabala Alava and Michal Gebauer.
#7390 depends on this commit.
fix cs.yml lost config/configuration.yml (#7408, #7390, #7507).
Warn about subtasks before deleting a parent issue (#6562).
Fixes pt locale (interpolation values is not something to translate).
Japanese translation updated by Go MAEDA (#8169).
