Mark onResetStreamStarted as direct connection

Not strictly necessary since this should always be on the same thread
anyway, but this communicates our intent that this function needs to run
in lockstep.

src/libclient/document.cpp

@@ -130,7 +130,7 @@ Document::Document(
 		&Document::onSessionResetted);
 	connect(
 		m_client, &net::Client::streamResetStarted, this,
-		&Document::onStreamResetStarted);
+		&Document::onStreamResetStarted, Qt::DirectConnection);
 	connect(
 		m_client, &net::Client::streamResetProgressed, this,
 		&Document::onStreamResetProgressed);