Bad interaction with focus-follows-mouse window-manager policy

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What steps will reproduce the problem?
1. Stack two windows over each other while using a window manager with focus 
follows mouse policy.
2. Place mouse over them, top-most window has focus
3. Use pywo to move the upper window away from under the mouse.

What is the expected output?

Focus is transferred to the lower window.

What do you see instead?

Instead it should be retained with the window being acted on currently.
This is irritating, as one usually would like to continue move the window that 
had focus just now.

What version of the product are you using? On what operating system?

current svn, xfwm4 wm

Please provide any additional information below.

I would probably be best to prevent focus transfer until the mouse is moved 
again, indicating that the current user interaction with the window via pywo is 
completed, at least as an option.

One possible workaround is to move the mouse pointer with the window (ugly but 
might solve the problem).

Original issue reported on code.google.com by Martin.P...@gmail.com on 20 Mar 2014 at 10:11