gEDA: x_multiatrib dialog: two small feature wishes

[Werner Hoch <werner_dot_ho-at-NOSPAMgmx_dot_de>]

Hi Patrick and all,

I've noticed two thing while playing with the dialog:

* it would be nice if the escape keypress would close the window.
* the window should stay in front of the gschem window.

The dialog is quit impressive. Have you used a tool like glade to create 
it? The source looks much better than mine (glade 2.0.1)

regards
Werner