MdeModulePkg/SetupBrowserDxe:Follow spec'd way to reconnect driver

REF:https://bugzilla.tianocore.org/show_bug.cgi?id=3952

In UEFI spec, it defines reconnect timing that will be activated upon
exiting of the formset or the browser. However, we did't use this kind
of way to check reconnect conditioncode. Code only blocks reconnect if
page is updated dynamically. That's not matched spec'd way. We should
check current formset whether is exiting, then reconnect driver.

Signed-off-by: Walon Li <walon.li@hpe.com>
Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>

MdeModulePkg/Universal/SetupBrowserDxe/Presentation.c

@@ -2,7 +2,7 @@
 Utility functions for UI presentation.
 
 Copyright (c) 2004 - 2018, Intel Corporation. All rights reserved.<BR>
-(C) Copyright 2015 Hewlett Packard Enterprise Development LP<BR>
+(C) Copyright 2015 - 2022 Hewlett Packard Enterprise Development LP<BR>
 SPDX-License-Identifier: BSD-2-Clause-Patent
 
 **/
@@ -21,7 +21,6 @@ LIST_ENTRY                mRefreshEventList  = INITIALIZE_LIST_HEAD_VARIABLE (mR
 UINT16                    mCurFakeQestId;
 FORM_DISPLAY_ENGINE_FORM  gDisplayFormData;
 BOOLEAN                   mFinishRetrieveCall = FALSE;
-BOOLEAN                   mDynamicFormUpdated = FALSE;
 
 /**
   Check whether the ConfigAccess protocol is available.
@@ -1791,7 +1790,6 @@ FormUpdateNotify (
   )
 {
   mHiiPackageListUpdated = TRUE;
-  mDynamicFormUpdated    = TRUE;
 
   return EFI_SUCCESS;
 }