#10 Modify focus follows mouse

[Unimog]

This reminds me of first and second year computing
when, for some reason, they enabled 'focus follows
mouse'. I have a habbit of brushing the mouse aside
when I start typing text.

Problem:
After selecting a text box in one of the four areas of
the main menu, I brush my mouse aside before typing.
This removes the focus immediately and I can no longer
input something.

Suggestion:
Change the focus switch so that, if a box in one area
is selected for input, the focus will not change unless
another area (or off-area) is clicked.