Updates and bugfixes to the agenda editing features
* Removes the pattern of using ScheduledSession m2m objects with one of the relationships left as None
* Improves scheduled session state handling
* Simplifies sending email to scheduled session requestors
* Improved timeslot purpose and room editing
* Improved access controls to editing forms
* Better test coverage for the meeting views
* Improvements to the javascript driven by prototyping automated tests
* Better initialization of a new meeting
On the session request form:
- Allows specifiying room resources (projectors, meetecho)
- Allows specifying what people must be present
On the schedule editing page:
- correctly calculates conflict levels
- displays conflicts in and out of each session separately
- italicizes BoFs
- shows resource and people conflicts
Adds automated placement as a management command
- Legacy-Id: 7628
Note: SVN reference [7561] has been migrated to Git commit 1221f79af9
bf1e44864d