sourceList">      <property name="visible">True</property>      <property name="can_focus">True</property>      <property name="headers_visible">False</property>      <property name="rules_hint">False</property>      <property name="reorderable">False</property>      <property name="enable_search">True</property>      <property name="fixed_height_mode">False</property>      <property name="hover_selection">False</property>      <property name="hover_expand">False</property>    </widget>         </child>       </widget>       <packing>         <property name="padding">0</property>         <property name="expand">True</property>         <property name="fill">True</property>       </packing>     </child>      <child>       <widget class="GtkVButtonBox" id="vbuttonbox0">         <property name="visible">True</property>         <property name="layout_style">GTK_BUTTONBOX_START</property>         <property name="spacing">0</property>          <child>    <widget class="GtkButton" id="button