[Zubersoft]

Sure, I have made that change for version 3.8.42 as far as the X1 mouse button, as Microsoft refers to it in their API. Escape will now trigger going back to the top level for a given tab as well.

I don't think Alt + Left arrow is a really commonly used keyboard shortcut (that's the first time I'm ever hearing about that), but if more users indicate that they would get use out of that, I can consider adding it. 

Thanks,
Mike