Fixes to the 'Forums' module:

- Editing now works, storing the altered message.
- Delete now works, not allowing deleting topics with replies.
- Proper cleanup of auxiliary tables is now done on deletion.
Fixes for properly handling recurring events and skipping non working days.
Minor color tweaks on the calendar views.
More fixes in the calendar views.

- Events now show their starting time.
- Events and tasks are sorted by starting time in week and monthly view.
Fix to allow stickyness of contacts selected when switching companies.
Previously switching the company on the contact selection form would clear
all selections.