QmlJSEditor: Don't trigger a reparse when dependencies change.

A semantic rehighlight suffices. This should avoid some parsing cycles
introduced earlier.

Reviewed-by: Roberto Raggi

src/plugins/qmljseditor/qmljseditor.h

@@ -260,6 +260,7 @@ private:
 
     QTimer *m_updateDocumentTimer;
     QTimer *m_updateUsesTimer;
+    QTimer *m_semanticRehighlightTimer;
     QComboBox *m_methodCombo;
     ModelManagerInterface *m_modelManager;
     QTextCharFormat m_occurrencesFormat;