Created attachment 294586 [details]
Screen of bug.

When using GMenuModel, icons does not always resize to GtkIconSizeMenu.

Example model (from screenshot):

     <item label="Development">
        <attribute name="icon">applications-development</attribute>

        <link name="submenu">
          <item target="CMake.desktop" action="app.launch-id" label="CMake">
            <attribute name="icon">CMakeSetup32</attribute>
          </item>
          <item target="geany.desktop" action="app.launch-id" label="Geany">
            <attribute name="icon">geany</attribute>
          </item>
          <item target="anjuta.desktop" action="app.launch-id" label="Интегрированная среда разработки Anjuta">
            <attribute name="icon">anjuta</attribute>
          </item>
          <item target="qdbusviewer-qt4.desktop" action="app.launch-id" label="Qt4 QDbusViewer ">
            <attribute name="icon">qdbusviewer-qt4</attribute>
          </item>
          <item target="policytool.desktop" action="app.launch-id" label="OpenJDK Policy Tool">
            <attribute name="icon">java</attribute>
          </item>
          <item target="linguist-qt4.desktop" action="app.launch-id" label="Qt4 Linguist ">
            <attribute name="icon">linguist-qt4</attribute>
          </item>
          <item target="jconsole.desktop" action="app.launch-id" label="OpenJDK Monitoring &amp; Management Console">
            <attribute name="icon">java</attribute>
          </item>
          <item target="qtcreator.desktop" action="app.launch-id" label="Qt Creator">
            <attribute name="icon">QtProject-qtcreator</attribute>
          </item>
          <item target="qdbusviewer.desktop" action="app.launch-id" label="Qt QDbusViewer ">
            <attribute name="icon">qdbusviewer</attribute>
          </item>
          <item target="assistant.desktop" action="app.launch-id" label="Qt Assistant">
            <attribute name="icon">assistant</attribute>
          </item>
          <item target="devhelp.desktop" action="app.launch-id" label="Devhelp">
            <attribute name="icon">devhelp</attribute>
          </item>
          <item target="designer.desktop" action="app.launch-id" label="Qt Designer">
            <attribute name="icon">designer</attribute>
          </item>
          <item target="designer-qt4.desktop" action="app.launch-id" label="Qt4 Designer">
            <attribute name="icon">designer-qt4</attribute>
          </item>
          <item target="poedit.desktop" action="app.launch-id" label="Poedit">
            <attribute name="icon">poedit</attribute>
          </item>
          <item target="assistant-qt4.desktop" action="app.launch-id" label="Qt4 Assistant ">
            <attribute name="icon">assistant-qt4</attribute>
          </item>
          <item target="linguist.desktop" action="app.launch-id" label="Qt Linguist">
            <attribute name="icon">linguist</attribute>
          </item>
          <item target="glade.desktop" action="app.launch-id" label="Glade">
            <attribute name="icon">glade</attribute>
          </item>
          <item target="gda-browser-5.0.desktop" action="app.launch-id" label="Браузер базы данных">
            <attribute name="icon">gda-browser-5.0</attribute>
          </item>
        </link>
      </item>