Set labels for toolbuttons

src/sugar/activity/widgets.py

@@ -37,6 +37,7 @@ class ActivityToolbarButton(ToolbarButton):
         toolbar.stop.hide()
 
         ToolbarButton.__init__(self, page=toolbar, **kwargs)
+        self.props.label = _('Activity toolbar')
 
         from sugar.activity.activity import get_bundle_path
         bundle = ActivityBundle(get_bundle_path())

src/sugar/graphics/radiopalette.py

@@ -94,5 +94,6 @@ class RadioPalette(Palette):
         if not isinstance(parent, RadioMenuButton):
             return
 
+        parent.props.label = button.palette_label
         parent.set_icon(button.props.icon_name)
         parent.selected_button = button