Changed clear playlist icon to "undo" icon

Previously the notification used the "cancel" icon.
BUG: 447826

src/qml/MediaPlayListView.qml

@@ -73,7 +73,7 @@ Kirigami.Page {
     Kirigami.Action {
         id: undoAction
         text: i18nc("Undo", "Undo")
-        icon.name: "dialog-cancel"
+        icon.name: "edit-undo"
         onTriggered: ElisaApplication.mediaPlayListProxyModel.undoClearPlayList()
     }