Add fifth view mode "Globe" for main window

For consistency I didn't change the meaning of Ctrl-1/2/3/4 and added
this as Ctrl-5 - but one could just as easily make the argument that
"ViewGlobe" should be Ctrl-4 and "ViewAll" should be Ctrl-5.

This ensures that only one of the four widgets is shown in the
individual modes, but it doesn't address the drawing issues with the
profile.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>