Fix Room Initial Position

When the room is changed set the roomlist view to the bottom making sure that it isn't in some random place.

BUG: 456647

src/qml/Page/RoomPage.qml

@@ -48,6 +48,7 @@ Kirigami.ScrollablePage {
 
     onCurrentRoomChanged: {
         applicationWindow().hoverLinkIndicator.text = "";
+        messageListView.positionViewAtBeginning();
         hasScrolledUpBefore = false;
     }