x11/xfce4-goodies: Remove MIDORI option

This is a followup to commit 32afc2de5073731f3fcdbfc38171908619651758 [1].

Midori is not part of XFCE anymore, so remove it from the metaport.

While here also reflow options, and add newlines to ease readability.

[1] https://cgit.freebsd.org/ports/commit/?id=32afc2de5073731f3fcdbfc38171908619651758