1) Check whether ConfigAccess is NULL before use it. 2) Don't do call back for UI_ACTION_REFRESH_FORMSET action. 3) Release resource before leave SetupBrowser() function. 4) Use the unified check method (HiiHandle, FormsetGuid and FormId) to check FORM is open or close. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10565 6f19259b-4bc3-4df7-8a09-765794883524