glretrace: Prevent deadlock on SetWindowPos.
glretrace: Prevent deadlock on SetWindowPos.

Achieve this by using a dedicated thread to process window events.  It is
the only practical solution for this.

trtt/apitrace,EoD/apitrace,trtt/apitrace,joshua5201/apitrace,joshua5201/apitrace,tuanthng/apitrace,trtt/apitrace,schulmar/apitrace,EoD/apitrace,tuanthng/apitrace,apitrace/apitrace,apitrace/apitrace,swq0553/apitrace,joshua5201/apitrace,apitrace/apitrace,swq0553/apitrace,swq0553/apitrace,surround-io/apitrace,EoD/apitrace,swq0553/apitrace,EoD/apitrace,joshua5201/apitrace,schulmar/apitrace,schulmar/apitrace,apitrace/apitrace,tuanthng/apitrace,tuanthng/apitrace,surround-io/apitrace,schulmar/apitrace,schulmar/apitrace,surround-io/apitrace,surround-io/apitrace,trtt/apitrace,EoD/apitrace,joshua5201/apitrace,tuanthng/apitrace,trtt/apitrace,surround-io/apitrace,swq0553/apitrace