WelcomeScreen: Don't move ScrollBar beyond scroll area.

Change-Id: I931256ced736c9d5514e50e7a2bd383d2e3fcfd0
Reviewed-on: http://codereview.qt.nokia.com/3398

Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Eike Ziller <eike.ziller@nokia.com>

share/qtcreator/welcomescreen/widgets/ExampleBrowser.qml

@@ -54,7 +54,7 @@ Item {
         anchors.right: parent.right
         anchors.bottomMargin: - 8
         anchors.leftMargin: -8
-        anchors.rightMargin: scrollArea.verticalScrollBar.visible ? 8 : -8
+        anchors.rightMargin: -8
 
 
         CheckBox {
@@ -117,7 +117,6 @@ Item {
                 delegate: ExampleDelegate { width: scrollArea.width; onTagClicked: exampleBrowserRoot.appendTag(tag) }
             }
         }
-        Component.onCompleted: verticalScrollBar.anchors.bottomMargin = -(scrollArea.anchors.bottomMargin + 8)
     }
 
     Rectangle {