Remove warnings on closing room

resources/qml/RoomList.qml

@@ -33,7 +33,8 @@ Page {
 
         Connections {
             function onCurrentRoomChanged() {
-                roomlist.positionViewAtIndex(Rooms.roomidToIndex(Rooms.currentRoom.roomId), ListView.Contain);
+                if (Rooms.currentRoom)
+                    roomlist.positionViewAtIndex(Rooms.roomidToIndex(Rooms.currentRoom.roomId), ListView.Contain);
             }
 
             target: Rooms

resources/qml/TimelineView.qml

@@ -85,9 +85,13 @@ Item {
                         target: timelineView
                     }
 
-                    MessageView {
+                    Loader {
+                        active: room || roomPreview
                         Layout.fillWidth: true
-                        implicitHeight: msgView.height - typingIndicator.height
+                        sourceComponent: MessageView {
+                            implicitHeight: msgView.height - typingIndicator.height
+                        }
+
                     }
 
                     Loader {