Registration page is not shown entirely

[Kernald]

When registering with an email not linked to a Gravatar account, fields for first name and last name are added. However, the form is still in a specifically-sized div, with a scrollbar, even if there's still room on the screen. I didn't noticed there was something under the new fields at first. The div should resize.

[parinporecha]

Patched it in commit 4dcada69d196ffe39f5f11861adeb41560844ec3

Now it'll expand in the space provided Closing the issue