Correct the translation and the "Close" button

Finalize-the-Russian-translation.patch

--- xfce4-cpugraph-plugin-1.2.3/panel-plugin/properties.c	2021-02-23 20:36:00.000000000 +0300
+++ xfce4-cpugraph-plugin-1.2.3-dfiff/panel-plugin/properties.c	2021-04-13 16:13:50.322718683 +0300
@@ -172,7 +172,7 @@
     dlg = xfce_titled_dialog_new_with_buttons (_("CPU Graph Properties"),
                                        GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (plugin))),
                                        GTK_DIALOG_DESTROY_WITH_PARENT,
-                                       "_Close",
+                                       _("Close"),
                                        GTK_RESPONSE_OK,
                                        NULL);