AutoTest: Redo reporting of disabled tests

Provide a proper way of reporting disabled tests instead
of the hacky one.

Change-Id: Id3a775d57ac20c9db8ad0f504cb708021117aa2f
Reviewed-by: David Schulz <david.schulz@qt.io>

src/plugins/autotest/testresultspane.cpp

@@ -157,6 +157,8 @@ TestResultsPane::TestResultsPane(QObject *parent) :
             this, &TestResultsPane::onTestRunFinished);
     connect(TestRunner::instance(), &TestRunner::testResultReady,
             this, &TestResultsPane::addTestResult);
+    connect(TestRunner::instance(), &TestRunner::hadDisabledTests,
+            m_model, &TestResultModel::raiseDisabledTests);
 }
 
 void TestResultsPane::createToolButtons()