QmlProjectManager: Fix initial state

Change-Id: I1b06e2b3f787671b18feef9bd85d971f7e5a27c0
Task-number: QTCREATORBUG-13970
Reviewed-by: Robert Loehning <robert.loehning@theqtcompany.com>
Reviewed-by: Daniel Teske <daniel.teske@theqtcompany.com>

src/plugins/qmlprojectmanager/qmlprojectrunconfiguration.cpp

@@ -104,6 +104,7 @@ void QmlProjectRunConfiguration::ctor()
         setDisplayName(tr("QML Scene", "QMLRunConfiguration display name."));
     else
         setDisplayName(tr("QML Viewer", "QMLRunConfiguration display name."));
+    updateEnabled();
 }
 
 QString QmlProjectRunConfiguration::executable() const