Product add-on duration multiplier does not check if valid against availability rules

[Janez Svetin]

If you have a product add-on setup which extends the duration of the appointment it does not check if the time is available. Example:

• you select the last time slot
• you multiply the duration through add-on for an additional hour
• cost calculation does not return invalid time selection

see also here: https://bizzthemes.com/forums/topic/is-there-an-easy-way-to-tie-add-ons-to-the-hours-multiplier-of-the-main-product/#post-123358

[Željan Topić]

Fixed with 3.0.7