datemenu does not catch mouse events

[Stéphane ANCELOT <sancelot free fr>]

Hi,
have a look at next image :

https://drive.google.com/file/d/0B2bN5i_rCBsINGk0S2pSSWRGZlk/view?usp=sharing


I have got a problem after moving datemenu button.
the mouse events are forward to the lower overlapped window (in this 
case, onboard keyboard) and datemenu does not work with mouse.

I do not know, if the issue has appeared because I moved the datemenu , 
or if I missed an event flag ?

Regards,
Steph