Delete an old dictionary available for selecting the aligment of text.
Deleting the counterpart of the dict in the templates.
Making reveal font-size a relative unit.
Fix related test.
Merge pull request #4702 from damianavila/rel_size

Making reveal font-size a relative unit.
Merge pull request #4701 from damianavila/del_align

Delete an old dictionary available for selecting the aligment of text.