Add bootstrap plugin (not included in fc by default anymore)
Activate compression
Make sure font awesome icons are used instead of loading bootstrap icons fc defaults to only for two buttons in fc
Remove copy-paste-error text in scheduler

Upgrade Fullcalendar to v6 (implements #186)
Upgrade jQuery to v3.6 (implements #185)
Upgrade Select2 to v4.0.13
Remove tag information leftover in track manager

Adapt loading templates
Move plan loader template to AKModel
Add new template to load all css and scripts for availabilities with one call
Use that loader in views with availabilities editors