wsa4000gui: start using streaming mode
wsa4000gui: keep all vrt context values received
wsa4000gui: stop and start stream capture around setting changes
discard vrt data received before context
wsa4000gui: flush if not resetting on startup
wsa4000gui: remember to request read permission
wsa4000gui flush buffer on setting changes
remove blocking gui: no longer supported
wsa4000demo: fix rbw control
include stream id context packets
wsa4000gui: use stream id to discard old vrt data being received