If using xtrn_head, display section name/header as well

If you aren't using a custom xtrn menu head per section, then you might fall back on a global one...but the prior logic would not display the actual section heading if it used a global (xtrn_head) file. If you are using xtrn_head, you don't have anything in there with a section name, so display the section name from code again

I don't think the xtrn_head display file is supposed to be used for sections. What if a sysop doesn't want that behavior?

Ah, I was confusing xtrn_head with xtrn_sec_head.

merged

mentioned in commit b71a8184

mentioned in commit 320dc151