[FEATURE] Add remove from calendar link for timeboxed tasks

[marcelfolaron]

Tasks that have been time boxed can not easily be remove from the calendar right now.
The current solution is to empty edit start/end date. Adding a link to the calendar even to remove a tasks would make this a lot easier.

[StackPie71]

Hi @marcelfolaron , any news on this one? Just for stuck on this, it was frustrating to not be able to remove the task from the calendar. Thanks.