unable to delete or edit events from popup

[ch604]

It looks like the event details popup code is mostly in line with the core frontend for the calendar:

https://github.com/karwosts/frontend/blob/dev/src/panels/calendar/dialog-calendar-event-detail.ts#L103

however, at the line indicated, there is code to add "delete" and "edit" buttons to the event popup, which would be very handy for quickly removing errant or duplicate events. please add this functionality to the planner card module as well.

[FamousWolf]

This is a duplicate of #136