Fix ForgetRoomPopup destruction/callback

src/qml/Popups/ForgetRoomPopup.qml

@@ -1,6 +1,7 @@
 import QtQuick 2.12
 
 BoxPopup {
+    id: popup
     summary.text: qsTr("Leave %1 and discard the history?").arg(roomName)
     details.text: qsTr(
         "You will not be able to see the messages you received in " +
@@ -12,11 +13,23 @@ BoxPopup {
     okText: qsTr("Forget")
     box.focusButton: "ok"
 
-    onOk: py.callClientCoro(userId, "room_forget", [roomId], forgottenCallback)
+    onOk: py.callClientCoro(userId, "room_forget", [roomId], () => {
+        if (window.uiState.page == "Chat/Chat.qml" &&
+            window.uiState.pageProperties.userId == userId &&
+            window.uiState.pageProperties.roomId == roomId)
+        {
+            pageLoader.showPage("Default")
+            Qt.callLater(popup.destroy)
+        }
+    })
+
+    onCancel: canDestroy = true
+    onClosed: if (canDestroy) Qt.callLater(popup.destroy)
 
 
     property string userId: ""
     property string roomId: ""
     property string roomName: ""
-    property var forgottenCallback: null
+
+    property bool canDestroy: false
 }