QmlProfiler: Center the binding loop marker on events in overview

Change-Id: If16ee4335b40e6ee611f04032246620ecf29f2db
Task-number: QTCREATORBUG-13453
Reviewed-by: Kai Koehne <kai.koehne@theqtcompany.com>

src/plugins/qmlprofiler/qml/Overview.js

@@ -81,7 +81,7 @@ function drawBindingLoops(canvas, ctxt) {
              ii += canvas.increment) {
             if (qmlProfilerModelProxy.bindingLoopDest(modelIndex,ii) >= 0) {
                 var xcenter = Math.round(qmlProfilerModelProxy.startTime(modelIndex,ii) +
-                                         qmlProfilerModelProxy.duration(modelIndex,ii) -
+                                         qmlProfilerModelProxy.duration(modelIndex,ii) / 2 -
                                          qmlProfilerModelProxy.traceStartTime()) * spacing;
                 var ycenter = Math.round(canvas.bump + canvas.blockHeight * modelIndex +
                                          canvas.blockHeight / 2);