Enhance CreatePopup to call ReadKeyStroke() before calling WaitForEvent(). This can handle the case when in lazy ConIn mode.
Enhance CreatePopup to call ReadKeyStroke() before calling WaitForEvent(). This can handle the case when in lazy ConIn mode.

Signed-off-by: Ruiyu Ni<ruiyu.ni@intel.com>
Reviewed-by: Eric Dong<eric.dong@intel.com>

git-svn-id: 5648d1bec6962b0a6d1d1b40eba8cf5cdb62da3d@13945 6f19259b-4bc3-4df7-8a09-765794883524

MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2