Without editing mount option is impossible make swap partition permanent by GUI.

Created attachment 356744 [details] [review]
Show mount options for swap volumes

Thanks for reporting this, here is a patch pending to be reviewed.

Review of attachment 356744 [details] [review]:

Hmm, ok, but we have to do something also with the prefilled mount options. I would say that "Show in user interface", "Display Name", "Icon Name" etc. don't make sense at all for swap...

::: src/disks/gdufstabdialog.c
@@ +411,3 @@
   data.symbolic_icon_entry = GTK_WIDGET (gtk_builder_get_object (builder, "fstab-symbolic-icon-entry"));
 
+  data.is_swap = udisks_object_peek_swapspace (object) != NULL;

data.is_swap = (udisks_object_peek_swapspace (object) != NULL);

Created attachment 357575 [details] [review]
Show mount options for swap volumes

The other irrelevant entries are now insensitive as well.

Review of attachment 357575 [details] [review]:

Thanks for update.

Does swap work correctly with "auto" filesystem type?

::: src/disks/gdufstabdialog.c
@@ +460,3 @@
+      dir = "none";
+      gtk_widget_set_sensitive (data.directory_entry, FALSE);
+      gtk_widget_set_sensitive (data.show_checkbutton, FALSE);

Yes, but you have to change also the default options, which currently contains the following:
opts = "nosuid,nodev,nofail,x-gvfs-show";

Also not sure about the other options...

Created attachment 357673 [details] [review]
Show mount options for swap volumes

Good that you've spotted this, I think these defaults are better now.

Review of attachment 357673 [details] [review]:

Looks ok.