minor fix and cleaning in AICalsPrefItem
fix raise bug in customize.py
multi_spin_button: fix FloatSpinButton, use one field only
bug fix in numEncode
bug fix in event editor dialog which was making exceptions afterwards
faster implementation of overlaps() function
bug fix in multi_spin.py: IntField: plus
version 2.2.4
bug fix in Active/Inactive Calendars
merge branch master into next