app, desktop: update demo tour for vector layers.

app/tools/gimppathoptions.c

@@ -27,6 +27,7 @@
 #include "libgimpcolor/gimpcolor.h"
 #include "libgimpconfig/gimpconfig.h"
 #include "libgimpwidgets/gimpwidgets.h"
+#include "libgimpwidgets/gimpwidgets-private.h"
 
 #include "tools-types.h"
 
@@ -574,6 +575,7 @@ gimp_path_options_gui (GimpToolOptions *tool_options)
   options->to_selection_button = button;
 
   button = gtk_button_new_with_label (_("Create New Vector Layer"));
+  gimp_widget_set_identifier (button, "create-new-vector-layer-button");
   gtk_box_pack_start (GTK_BOX (vbox), button, FALSE, FALSE, 0);
   gtk_widget_set_sensitive (button, FALSE);
   gimp_help_set_help_data (button, NULL, NULL);

desktop/org.gimp.GIMP.appdata.xml.in.in

@@ -89,7 +89,8 @@
         less-destructive layers which are the key points of upcoming GIMP 3.2.
         </p>
         <ul>
-          <li demo="toolbox:path">
+          <li demo="toolbox:path,
+                    tool-options:create-new-vector-layer-button">
           New type of layers: vector layers.
           </li>
           <li>