Mark canceled searches as such.

Task-number: QTCREATORBUG-6820

Change-Id: Ic14c0ea6f26e4a05c642012b87578f30c817fef7
Reviewed-by: Robert Löhning <robert.loehning@nokia.com>
Reviewed-by: Eike Ziller <eike.ziller@nokia.com>

src/plugins/qmljseditor/qmljsfindreferences.cpp

@@ -958,7 +958,7 @@ void FindReferences::displayResults(int first, int last)
 void FindReferences::searchFinished()
 {
     if (m_currentSearch)
-        m_currentSearch->finishSearch();
+        m_currentSearch->finishSearch(m_watcher.isCanceled());
     m_currentSearch = 0;
     emit changed();
 }