[#74220744] add link to attendances in navbar
[#74220744] show timeslots wout schedule on top

- show a warning message.
- added pry for developent
Merge 74220744-warn-if-timeslot-withou-schedule to master

[Completes #74220744]
[#74220744] fix view spec
dont show warning if there are no timeslots wout schedule