Hopefully get the right dispose order

warn:legacy.osl:9070:1:vcl/source/window/window.cxx:281:
Window ( 17FileViewContainer()) with live children destroyed:
 11SvtFileView() 8Splitter() 10FolderTree()

Change-Id: I6be256337123fc1c3ff2651bcd9f695c8918bb8e

fpicker/source/office/RemoteFilesDialog.cxx

@@ -36,6 +36,7 @@ class FileViewContainer : public vcl::Window
     virtual void dispose() SAL_OVERRIDE
     {
         m_pFileView.clear();
+        m_pTreeView.clear();
         m_pSplitter.clear();
         vcl::Window::dispose();
     }
@@ -248,10 +249,10 @@ void RemoteFilesDialog::dispose()
 
     batch->commit();
 
-    m_pContainer.disposeAndClear(); // container must be first!
     m_pTreeView.disposeAndClear();
     m_pFileView.disposeAndClear();
     m_pSplitter.disposeAndClear();
+    m_pContainer.disposeAndClear();
     m_pPath.disposeAndClear();
 
     m_pOk_btn.clear();