LockCLock: Remove calendar icon

Remove the calendar icon from the panel.
Patch 4: Removed all references to hiding the icon
JIRA: CYAN-1735

Change-Id: I22fee93d720f407caf611b1f6d04ea05742e1647
LockClock: added "Today" timeframe to calendar event lookahead

Adds ability for lockclock to display only those events happening
before midnight each individual day.

Change-Id: Ifd9c74f0545a0fd0b2c0e7416ba8e23d5735e590
Patch 2: Rebased after 47249 commit
JIRA: CYAN-1868