QmlProfiler: Switch recording button only on "Complete"

We can rely on Qt to send a completion message nowadays and keeping
the recording button active enables us to stream events without UI
glitches.

Change-Id: If897413e5224b359042235e4653fc2a35b0b92e7
Reviewed-by: Joerg Bornemann <joerg.bornemann@theqtcompany.com>

src/libs/qmldebug/qmlprofilertraceclient.cpp

@@ -255,6 +255,7 @@ void QmlProfilerTraceClient::messageReceived(const QByteArray &data)
     }
     case Complete:
         emit complete(d->maximumTime);
+        setRecordingFromServer(false);
         break;
     case SceneGraphFrame: {
         if (!d->updateFeatures(ProfileSceneGraph))
@@ -380,8 +381,4 @@ void QmlProfilerTraceClient::messageReceived(const QByteArray &data)
     default:
         break;
     }
-
-    // stop with the first data
-    if (messageType != Event || subtype != StartTrace)
-        setRecordingFromServer(false);
 }