Merge branch 'hotfix-imageCaching'

* hotfix-imageCaching:
  Implemented improved handling of both attendee and meeting list UI updates
Merge branch 'dev'

* dev:
  Fixed issue that could cause duplicate entries in daily booking list
  Fixed odd bug that was causing runtime errors when interacting with a timeline from within a channel event
  Fixed bug with array copy in attendee list caching
  Removed unnesseccary panel online check
  Fixed bug in temporary ID check method that would attempt an impossible string match
  Blocked updates from going to panel unless it is online
Removed unnessecary define_module statements
Implemented (bad) Gravatar support for attendee profile images