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/1f537.svg

@@ -1 +1 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64" enable-background="new 0 0 64 64"><path transform="matrix(.7071-.7071.7071.7071-13.255 31.9997)" fill="#0071b8" d="m10.8 10.8h42.4v42.4h-42.4z"/></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(1.061,16.9385)" id="g20"><path id="path22" style="fill:#55acee;fill-opacity:1;fill-rule:nonzero;stroke:none" d="M 0,0 C -0.583,0.584 -0.583,1.539 0,2.122 L 15.879,18 c 0.583,0.583 1.538,0.583 2.121,0 L 33.879,2.121 C 34.462,1.538 34.462,0.583 33.879,0 L 18,-15.878 c -0.583,-0.583 -1.538,-0.583 -2.121,0 L 0,0 Z"/></g></g></g></g></svg>