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/1f4a7.svg

@@ -1 +1 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64" enable-background="new 0 0 64 64"><path d="M32,2C20.6,17.6,14,32,14,43.8c0,10,8.1,18.2,18,18.2c9.9,0,18-8.1,18-18.2C50,32,43.2,17.4,32,2z" fill="#75d6ff"/></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(28.3438,18.2324)" id="g20"><path id="path22" style="fill:#5dadec;fill-opacity:1;fill-rule:nonzero;stroke:none" d="M 0,0 -10.195,16.678 -19.644,0.113 c -2.2,-3.509 -2.391,-8.074 -0.081,-11.853 3.286,-5.373 10.364,-7.098 15.811,-3.858 C 1.532,-12.357 3.285,-5.377 0,0"/></g></g></g></g></svg>