Fix Alt-Tab in Labview

In all Windows applications Alt+Tab switches to the most recently used window.

In Labview it switches to the most recently used LabView window.

This means that to get back to the browser window if you have just alt-tabbed to LabView it will take about 2n-1 strokes of Alt+Tab where n is the number of opened vi's.

This python script mapped to Alt+` with Autohotkey solves the issue in the following manner:

1. For normal (non-labview) windows it behaves just as alt-tab pressed once
2. For labview windows it switches to most recently used non-labview window.

For the browser vs labview problem described above it means that after switching to LabView from the browser you can work with several LabView files, switching between them with Alt-Tab, and then you press Alt+` and you're in the browser again.