Confirm leaving room with popup

src/qml/Popups/LeaveRoomPopup.qml

@@ -0,0 +1,17 @@
+import QtQuick 2.12
+
+BoxPopup {
+    summary.text: qsTr("Leave %1?").arg(roomName)
+    details.text: qsTr(
+        "If this room is private, you will not be able to rejoin it."
+    )
+    okText: qsTr("Leave")
+    box.focusButton: "ok"
+
+    onOk: py.callClientCoro(userId, "room_leave", [roomId])
+
+
+    property string userId: ""
+    property string roomId: ""
+    property string roomName: ""
+}

src/qml/SidePane/RoomDelegate.qml

@@ -108,8 +108,14 @@ HTileDelegate {
             icon.color: theme.colors.negativeBackground
             text: invited ? qsTr("Decline invite") : qsTr("Leave")
 
-            onTriggered: py.callClientCoro(
-                model.user_id, "room_leave", [model.data.room_id]
+            onTriggered: Utils.makePopup(
+                "Popups/LeaveRoomPopup.qml",
+                sidePane,
+                {
+                    userId: model.user_id,
+                    roomId: model.data.room_id,
+                    roomName: model.data.display_name,
+                }
             )
         }