Update docs/languages/en/modules/zend.form.advanced-use-of-forms.rst

A lot of minor changes
Reverted to the non-capitalized titles.

As per @Maks3w 's request.
Merge branch 'patch-68' of https://github.com/Ore4444/zf2-documentation into Ore4444-patch-68
Merge branch 'Ore4444-patch-68'