Issues around the Users agenda when switching between Conferences

[KevinSchildhorn]

If you add a talk to your agenda then change the conference the talk still appears. Then if you click it the app crashes because it can't find the talk.

Repo Steps:

1. Bookmark a talk
2. Change the conference in the settings
3. Go to "My Agenda" tab
4. Click on your bookmarked talk

The app will likely crash, and when you re-open the talk won't be on the agenda.

This is likely because the app is looking for the talk ID however now that the conference has changed the json does not contain that talk.

Possible Solutions:

• Make Agendas conference specific
  • hide agenda when conference changes
  • Gray out Agenda topics if they're not in selected conference
• Enable allowing user to click on items from other talks (possibly more difficult)