Cancel device delete when popup closed

src/gui/Popups/DeleteDevicesPopup.qml

@@ -3,6 +3,7 @@
 import QtQuick 2.12
 import "../Base"
 import "../Base/ButtonLayout"
+import "../PythonBridge"
 
 PasswordPopup {
     id: popup
@@ -12,13 +13,18 @@ PasswordPopup {
     property var deviceIds  // array
     property var deletedCallback: null
 
+    property Future deleteFuture: null
+
 
     function verifyPassword(pass, callback) {
-        py.callClientCoro(
+        deleteFuture = py.callClientCoro(
             userId,
             "delete_devices_with_password",
             [deviceIds, pass],
-            () => callback(true),
+            () => {
+                deleteFuture = null
+                callback(true)
+            },
             (type, args) => {
                 callback(
                     type === "MatrixUnauthorized" ?
@@ -36,5 +42,10 @@ PasswordPopup {
     validateButton.text: qsTr("Sign out")
     validateButton.icon.name: "sign-out"
 
-    onClosed: if (acceptedPassword && deletedCallback) deletedCallback()
+    onClosed: {
+        if (deleteFuture) deleteFuture.cancel()
+
+        if (deleteFuture || acceptedPassword && deletedCallback)
+            deletedCallback()
+    }
 }