Export Config: Use ModelessDialog

The huge size of this dialog calls for a maximize button...

Change-Id: I68706669ac4e10ea9d5cba5526e9f1b0eb3628b6

cui/source/options/optaboutconfig.cxx

@@ -130,7 +130,7 @@ Size CuiAboutConfigTabPage::GetOptimalSize() const
 }
 
 CuiAboutConfigTabPage::CuiAboutConfigTabPage( Window* pParent/*, const SfxItemSet& rItemSet*/ ) :
-    ModalDialog( pParent, "AboutConfig", "cui/ui/aboutconfigdialog.ui"),
+    ModelessDialog( pParent, "AboutConfig", "cui/ui/aboutconfigdialog.ui"),
     m_pPrefCtrl( get<SvSimpleTableContainer>("preferences") ),
     m_pResetBtn( get<PushButton>("reset") ),
     m_pEditBtn( get<PushButton>("edit") ),

cui/source/options/optaboutconfig.hxx

@@ -40,7 +40,7 @@ public:
     //void setBehaviour( bool bNumeric, int nLengthLimit);
 };
 
-class CuiAboutConfigTabPage : public ModalDialog
+class CuiAboutConfigTabPage : public ModelessDialog
 {
 private:
     SvSimpleTableContainer* m_pPrefCtrl;

cui/uiconfig/ui/aboutconfigdialog.ui

@@ -5,6 +5,7 @@
   <object class="GtkDialog" id="AboutConfig">
     <property name="can_focus">False</property>
     <property name="border_width">5</property>
+    <property name="title" translatable="yes">Expert Configuration</property>
     <property name="type_hint">dialog</property>
     <child internal-child="vbox">
       <object class="GtkBox" id="dialog-vbox1">