Stop key press on many2one, reference, calendar for F2 and F3

tryton/gui/window/view_form/view/form_gtk/calendar.py

@@ -60,6 +60,7 @@ class Calendar(WidgetInterface):
     def sig_key_press(self, widget, event):
         if event.keyval == gtk.keysyms.F2:
             self.cal_open(widget)
+            return True
 
     def grab_focus(self):
         return self.entry.grab_focus()
@@ -180,6 +181,7 @@ class DateTime(WidgetInterface):
     def sig_key_press(self, widget, event):
         if event.keyval == gtk.keysyms.F2:
             self.cal_open(widget)
+            return True
 
     def grab_focus(self):
         return self.entry.grab_focus()

tryton/gui/window/view_form/view/form_gtk/many2one.py

@@ -348,8 +348,10 @@ class Many2One(WidgetInterface):
     def sig_key_press(self, widget, event, *args):
         if event.keyval == gtk.keysyms.F3:
             self.sig_new(widget, event)
+            return True
         elif event.keyval==gtk.keysyms.F2:
             self.sig_edit(widget)
+            return True
         elif event.keyval  == gtk.keysyms.Tab:
             if self._view.modelfield.get(self._view.model) or \
                     not self.wid_text.get_text():

tryton/gui/window/view_form/view/form_gtk/reference.py

@@ -206,8 +206,10 @@ class Reference(WidgetInterface):
     def sig_key_press(self, widget, event):
         if event.keyval == gtk.keysyms.F3:
             self.sig_new(widget, event)
+            return True
         elif event.keyval == gtk.keysyms.F2:
             self.sig_focus_out(widget, event)
+            return True
         elif event.keyval == gtk.keysyms.Tab:
             if self._view.modelfield.get(self._view.model) or \
                     not self.wid_text.get_text():