Fit modeless preferences dialog to its contents too.

When a preferences dialog is shown non-modally, it should still fit to the
contents of its pages, so move the code added for the modal case in r73624
to the base wxGenericPreferencesEditorImplBase class.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74040 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/preferencesg.cpp

@@ -125,6 +125,8 @@ protected:
             dlg->AddPage(i->get());
         }
 
+        dlg->Fit();
+
         return dlg;
     }
 
@@ -207,8 +209,6 @@ public:
         m_dlg = dlg.get();
         wxON_BLOCK_EXIT_NULL(m_dlg);
 
-        dlg->Fit();
-
         // Restore the previously selected page, if any.
         if ( m_currentPage != -1 )
             dlg->SelectPage(m_currentPage);