update metadata

metadata/en-US/full_description.txt

@@ -9,3 +9,7 @@ Megalodon is a modified version of the <a href="https://github.com/mastodon/mast
 - <b>Follow hashtags</b>: See new posts from specific hashtags directly in your home timeline by following them.
 - <b>Answering follow requests</b>: Accept or decline follow requests from your notifications or the dedicated Follow requests list.
 - <b>Delete and re-draft</b>: The much-loved feature that made editing possible without an actual editing function.
+- <b>Language selector</b>: Painlessly select the language for every post you make so filters and translation are working correctly.
+- <b>Translation</b>: Easily translate posts right inside Megalodon! Only works if the feature is also available on your Mastodon Web.
+- <b>Post visibility indicator</b>: When opening or replying to a post, a handy icon indicating the post’s visibility will be displayed.
+- <b>Color themes</b>: Should you not like the default Pink color them (the shark is silently judging you), Moshidon’s color themes got you covered.