Make quick settings page indicator clickable

The page dots were non-interactive so clicks fell through to the
swipe area and closed the drawer. Set interactive:true and sync
the index back to the SwipeView so clicking a dot switches pages.

components/mobileshell/qml/actiondrawer/private/QuickSettings.qml

@@ -197,6 +197,8 @@ Item {
                 sourceComponent: PageIndicator {
                     count: swipeView.count
                     currentIndex: swipeView.currentIndex
+                    interactive: true
+                    onCurrentIndexChanged: swipeView.currentIndex = currentIndex
 
                     delegate: Rectangle {
                         implicitWidth: 8