Process all pending events when calling main_iteration for issue1571

(transplanted from dac9e96ee7aa7579db1fe33c1f31e0092325da15)

tryton/common/cellrendererbutton.py

@@ -77,7 +77,8 @@ class CellRendererButton(gtk.GenericCellRenderer):
                     and event.keyval == gtk.keysyms.space)):
             self.clicking = True
             widget.queue_draw()
-            gtk.main_iteration()
+            while gtk.events_pending():
+                gtk.main_iteration()
             self.emit("clicked", path)
             def timeout(self, widget):
                 self.clicking = False

tryton/common/common.py

@@ -1004,10 +1004,12 @@ class RPCProgress(object):
                     win.set_modal(True)
                     win.show_all()
                 progressbar.pulse()
-                gtk.main_iteration()
+                while gtk.events_pending():
+                    gtk.main_iteration()
         if win:
             win.destroy()
-            gtk.main_iteration()
+            while gtk.events_pending():
+                gtk.main_iteration()
         if self.exception:
             raise self.exception
         return self.res