cLock: minor code cleanups (remove unused imports/variables/dead code, explicit usage of default locale)

Change-Id: Ib570f492a5163089542871020eb9db0a19019951
cLock: Hide the calendar panel if there are no events to show

This fixes a regression introduced with the scrolling events list
feature

Change-Id: I949cc7ee72ecbd866ad6037454a647cab05404c9
cLock: Change Calendar default lookahead to two weeks

Change-Id: If31008a8485008a4b40cc42d62ac043be521a937