Time display upon waking bugfix (minor)

After the clock woke from sleep, time might be incorrectly displayed
for up to one second.  Upon the next tick of the clock, the display
would be updated.  This has been fixed.
Slowed repetitive display animations

The rolling colons time separator now transitions slower, and the time
format selection menu now blinks slower.  These changes should reduce
the risk of seizures for photosensitive epileptics.
Aesthetic bugfix to hour-minute time display

The hours are now displayed starting on the second and third display
digits for the hour-minute time display format which displays only the
hour and the minute.  This fixes a minor bug introduced a few commits
ago which caused the hours to be displayed on the first and second
display positions.  The hour-minute time display format looks better
now.