Switch from EmojiOne to Twemoji, different emoji picker (#5046)

* Switch from EmojiOne to Twemoji, different emoji picker

* Make emoji-mart use a local spritesheet

* Fix emojify test

* yarn manage:translations

public/emoji/23f8.svg

@@ -1 +1 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64" enable-background="new 0 0 64 64"><circle cx="32" cy="32" r="30" fill="#4fd1d9"/><g fill="#fff"><path d="m20 14h8v36h-8z"/><path d="m36 14h8v36h-8z"/></g></svg>
+<?xml version="1.0" encoding="UTF-8" standalone="no"?><svg xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:cc="http://creativecommons.org/ns#" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:svg="http://www.w3.org/2000/svg" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 45 45" style="enable-background:new 0 0 45 45;" xml:space="preserve" version="1.1" id="svg2"><metadata id="metadata8"><rdf:RDF><cc:Work rdf:about=""><dc:format>image/svg+xml</dc:format><dc:type rdf:resource="http://purl.org/dc/dcmitype/StillImage"/></cc:Work></rdf:RDF></metadata><defs id="defs6"><clipPath id="clipPath16" clipPathUnits="userSpaceOnUse"><path id="path18" d="M 0,36 36,36 36,0 0,0 0,36 Z"/></clipPath></defs><g transform="matrix(1.25,0,0,-1.25,0,45)" id="g10"><g id="g12"><g clip-path="url(#clipPath16)" id="g14"><g transform="translate(36,4)" id="g20"><path id="path22" style="fill:#3b88c3;fill-opacity:1;fill-rule:nonzero;stroke:none" d="m 0,0 c 0,-2.209 -1.791,-4 -4,-4 l -28,0 c -2.209,0 -4,1.791 -4,4 l 0,28 c 0,2.209 1.791,4 4,4 l 28,0 c 2.209,0 4,-1.791 4,-4 L 0,0 Z"/></g><path id="path24" style="fill:#ffffff;fill-opacity:1;fill-rule:nonzero;stroke:none" d="m 25,7 -5,0 0,22 5,0 0,-22 z"/><path id="path26" style="fill:#ffffff;fill-opacity:1;fill-rule:nonzero;stroke:none" d="m 16,7 -5,0 0,22 5,0 0,-22 z"/></g></g></g></svg>