Put the dive number and location in the window title bar

Put the dive number and location in the window title bar

I suspect the "info" area is better used for actual values, so move the
dive location into the window title instead (using date if no location
info), and title the info frame with date and time.

This just means that the date/time gets removed from inside the frame:
we may want to put air consumption info in there instead?

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>