Export FormWindowEditor from the designer plugin.

The Qt4ProjectManagerPlugin needs that for the dynamic ui completion.

Reviewed-By: Friedemann Kleint <Friedemann.Kleint@nokia.com>

src/plugins/designer/formwindoweditor.cpp

@@ -356,3 +356,10 @@ QString FormWindowEditor::contextHelpId() const
     return className;
 #endif
 }
+
+QString FormWindowEditor::contents() const
+{
+    if (m_host && m_host->formWindow())
+        return m_host->formWindow()->contents();
+    return QString::null;
+}