Delay the button clicked callback from cellrenderer

Because it may raise a confirmation popup which is not supported on Windows
during the callback event.

issue11606
review419561003
(grafted from e0d0a14b82edd102075f72adc24c6b23d40a72fc)

--HG--
branch : 6.0

tryton/gui/window/view_form/view/list_gtk/widget.py

@@ -1296,6 +1296,7 @@ class Button(Cell):
         # TODO icon
         self._set_visual(cell, record)
 
+    @common.idle_add
     def button_clicked(self, widget, path):
         if not path:
             return True