Use the same (parent) object since units will accumulate the list of cache attributes to clear in the parent Store object
Fix a typo
Delete temporary command refresh_all_stats and update refresh_stats docs
Try a faster get_last_action calculation method
Do not blindly reset cache stats
Fix bug introduced by 18c1320
Fix bug introduced by 69d4ce7
Split one big django query into three very small ones
Fix cache stats updating when Unit state is changed
Properly refresh stats for directories, translation projects, languages and projects