[Feature] Refactor details screen - merge view and edit

[patrickunterwegs]

TODO:

• [x] Alarms
• [x] Attachments
• [ ] Attendees
• [ ] Categories
• [x] Collections
• [x] Comments
• [x] Contact
• [x] Dates
• [x] Location
• [ ] Parents
• [x] Recur
• [ ] Resources
• [x] Status, Classification, Priority
• [ ] Subnotes
• [ ] Subtasks
• [x] Summary
• [x] Description
• [x] Url
• [ ] Refactor date fields in single elements (also movable)
• [ ] Check location and geofencing