#38 halving dual monitor setup problem

[Georg Kowallek]

Setup:
Dual monitor card
Monitor on line 2 is main monitor in win
Monitor on line 1 is 2nd monitor in win

Main monitor has a geoshell desktop size setting, 2nd
monitor has not. Everything works as expected.

Problem:
When I disable the 2nd monitor (for gaming or
power/res. saving) the main monitor has no longer
desktop size settings.