QmlProfiler: Make TimeDisplay more configurable

With the extra parameters we can also use it for the labels on the top
of the overview

Change-Id: Icd1a515498455f1f6247845ac559f07eaef40d08
Reviewed-by: Kai Koehne <kai.koehne@theqtcompany.com>

src/plugins/qmlprofiler/qml/MainView.qml

@@ -172,7 +172,8 @@ Rectangle {
         anchors.left: buttonsBar.right
         anchors.right: parent.right
         anchors.bottom: overview.top
-        zoomer: zoomControl
+        windowStart: zoomControl.windowStart
+        rangeDuration: Math.max(1, Math.round(zoomControl.rangeDuration))
         contentX: content.contentX
         clip: true
     }