Fix user profile form saving.
Fix user profile form saving.

The profile form only saved values if the backend *didn't* support changing
them. This looks like a copy/paste-o.

Testing done: Changed my real name and email address successfully.

Fixes bug 3268.

Reviewed at https://reviews.reviewboard.org/r/5559/

beol/reviewboard,davidt/reviewboard,brennie/reviewboard,sgallagher/reviewboard,1tush/reviewboard,1tush/reviewboard,KnowNo/reviewboard,custode/reviewboard,KnowNo/reviewboard,1tush/reviewboard,beol/reviewboard,1tush/reviewboard,1tush/reviewboard,reviewboard/reviewboard,custode/reviewboard,bkochendorfer/reviewboard,bkochendorfer/reviewboard,chipx86/reviewboard,1tush/reviewboard,beol/reviewboard,KnowNo/reviewboard,reviewboard/reviewboard,sgallagher/reviewboard,beol/reviewboard,chipx86/reviewboard,reviewboard/reviewboard,sgallagher/reviewboard,bkochendorfer/reviewboard,brennie/reviewboard,KnowNo/reviewboard,bkochendorfer/reviewboard,1tush/reviewboard,chipx86/reviewboard,reviewboard/reviewboard,1tush/reviewboard,chipx86/reviewboard,davidt/reviewboard,davidt/reviewboard,1tush/reviewboard,sgallagher/reviewboard,brennie/reviewboard,davidt/reviewboard,custode/reviewboard,custode/reviewboard,brennie/reviewboard