A plain GtkMenuItem works just fine here.
</object>
</child>
<child>
- <object class="GtkImageMenuItem" id="togglesmenuitem">
+ <object class="GtkMenuItem" id="togglesmenuitem">
<property name="label">Checks & Radios</property>
<property name="visible">True</property>
<property name="can_focus">False</property>
- <property name="use_action_appearance">False</property>
<property name="use_underline">True</property>
- <property name="use_stock">False</property>
<child type="submenu">
<object class="GtkMenu" id="togglessubmenu">
<property name="visible">True</property>