Fix the geometry when restoring from zoomed state.

Fix the geometry when restoring from zoomed state.

The patch to handle the geometry of a restored gitk by Alexy Borzenkov
causes the position of the columns to creep each time the application
is restarted. This patch addresses this by remembering the application
geometry for the normal state and saving that regardless of the actual
state when the application is closed.

Signed-off-by: Pat Thoyts <patthoyts@users.sourceforge.net>