Add name and html_name when form is prefixed.

(cherry picked from commit 2aabd1d1591b89fe0dc8633fc52322843d323752)

Reviewed-By: Antoine Catton <acatton@fusionbox.com>
(cherry picked from commit c3a30c9d45a4b949afe8cbec628493800f0e2fbf)
CHANGES for 1.1.1

(cherry picked from commit a8403559021b1065dfec9f3a681b605dca880dc1)

Conflicts:
	CHANGES