Fix constraint checking issues

Make sure post_save signal is sent after update of availabilities by manually triggering post_save signal after bulk create of replacing availabilities. This fixes #132 (closed)

Update/delete constraint violations when corresponding slot is deleted. This fixes #131 (closed)

changed milestone to %KIF 50,0

added bug label

requested review from @ngeisler

approved this merge request

added 17 commits

• a3ccf65b...b00d0427 - 15 commits from branch main
• c9e4be83 - Make sure post_save signal is sent after update of availabilities
• 8b5ffde8 - Update/delete constraint violations when corresponding slot is deleted

Compare with previous version

merged

mentioned in commit ba15b01d