Revert "Adds small margin-top to submit buttons"
Revert "Adds small margin-top to submit buttons"

This reverts commit 2762e78ad21874e925673cee30d1664911814d8a.

I only tested this change on the Change Password form. There are other
forms where this change doesn't work correctly, for example the Edit
Assessment form when the Delete this Assignment button is also present.

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