Thank you so much for the help. It seems everything works as intended.
Except this part:
After removing it, the htmleditor is removed yes. But I'm unable to Accept or Reject the booking request.
Clicking on the REJECT button has no response whatsoever. Clicking on the Accept button will show a Loading text and that's that, nothing happend.
Would you please take a look at this?
Yes, sorry.
You need change the plugins/booking/static/lib.js file:
1. find line (~591) in function bookingRequestHandler()