Themes: Add "Block Editor Patterns" and "Full Site Editing" to the list of...

Themes: Add "Block Editor Patterns" and "Full Site Editing" to the list of WordPress theme features.

Follow-up to [meta9876].

Props dingo_d.
Fixes #50164. See #meta5212.
Built from https://develop.svn.wordpress.org/trunk@47797


git-svn-id: https://core.svn.wordpress.org/trunk@47573 1a063a9b-81f0-0310-95a4-ce76da25c4cd