Add Help option to application menu: Bug #732302

This introduces the "_Help" string to the .pot in preparation for
actual Yelp help (coming soon).

This also binds F1 to help.
Calendar name selected in calendar manager unreadable: Bug #736119

Unreadable under Ambiance theme.
Finnish translation update by Jiri Grönroos
Display only needed number of weeks in Month view: Bug #735837

MonthGrid is no longer able to reconfigure itself; if the week
configuration changes (i.e. new first-of-the-week value), the grid(s)
must be destroyed and rebuilt, including their calendar source
subscriptions.
Return to event editor when event cannot be created: Bug #735796

Small overhaul of the Deck/Card reporting system to break out
reporting Card error messages from dismissing the Deck.
Remove calendar: Bug #727001

User can now remove a calendar via the calendar manager.  The warning
text depends on if the calendar is local (which is a permanent delete)
or network (in which case, the network data is untouched).
Give activator list initial focus when adding calendar
Make "Subscribe" button default when adding calendar
Return to calendar manager after adding new calendar

Previously, the calendar manager would close after adding one.
Clean up Google authenticating pane

Add suggested-action and default to "Try Again" button, some padding
for the message text.
Reflect display changes to calendars in Week view: Bug #730670
Merge branch 'master' into wip/736262-first