Allow adding ATTENDEEs when converting message to event

Is your feature request related to a problem? Please describe.

For a mail in the 'more actions' menu there is the option to convert a mail to an event. This allows you to create an event but none of the email addresses are added to that event. You then have to amend the event to add attendees. It doesn't really add much versus just opening calendar and creating the event from there. It also doesn't add much scope to modify the event as you create it.

Describe the solution you'd like

This would be more useful if there was an option to add the people on the email, i.e. their email addresses as attendees for the event. You could have tick boxes for each email to choose to add them to the event invitation.

The better solution might be actually to open the calendar view, editing the new event, with the email addresses added to the attendee list, where they could be removed if necessary. Maybe this could be in combination with the tick box option described above. This would be ideal and allow you to finish editing the event before saving and having any invites sent.

Describe alternatives you've considered

No response

Additional context

No response

Start from the mail item's “more actions” conversion entry point and inspect how the new event is opened or saved. Define the attendee-selection and event-editing flow described in the issue, then verify that selected email addresses appear as attendees before invitations are sent.