QXEmbed grabbing mouse

[Charles Samuels]

In version 30 of qxembed.cpp, some mouse grab stuff was added.

This is a major change in behavior which can cause the mouse to take and not 
give up.  Basically, when the app that owns the QXEmbed tries to get mouse 
clicks from the embedded app, and the embedded app lets all events fall 
through.

I would like to know the rationale for this feature, and a potential 
workaround for my mouse grabbing problem.

-Charles