Further mark messages read fixes

Add a timer to lockout the scroll trigger for marking messages as read in the first second after changing room. This is because the scrollview can't differentiate between mouse scrolling and the multiple changes in scrollview that happen as the room is changed over.

src/qml/Component/TimelineView.qml

@@ -17,10 +17,10 @@ QQC2.ScrollView {
     required property NeoChatRoom currentRoom
     onCurrentRoomChanged: {
         roomChanging = true;
+        roomChangingTimer.restart()
         applicationWindow().hoverLinkIndicator.text = "";
         messageListView.positionViewAtBeginning();
         hasScrolledUpBefore = false;
-        roomChanging = true;
     }
     property bool roomChanging: false
     readonly property bool atYEnd: messageListView.atYEnd
@@ -79,6 +79,13 @@ QQC2.ScrollView {
             messageEventModel.fetchMore(messageEventModel.index(0, 0));
         }
 
+        Timer {
+            id: roomChangingTimer
+            interval: 1000
+            onTriggered: {
+                root.roomChanging = false
+            }
+        }
         onAtYEndChanged: if (!root.roomChanging) {
             if (atYEnd && root.hasScrolledUpBefore) {
                 if (QQC2.ApplicationWindow.window && (QQC2.ApplicationWindow.window.visibility !== QQC2.ApplicationWindow.Hidden)) {