Fix emoji and other related bugs (#1504)

* make system-emoji default & twitter emoji optional

* add mozilla twemoji-colr credit

* fix wrong audio duration

* set locales to empty in member count millify

* render system emoji as same size of custom emoji

src/app/styles/CustomHtml.css.ts

@@ -187,11 +187,11 @@ export const Emoticon = recipe({
 
       height: '1em',
       minWidth: '1em',
-      fontSize: '1.47em',
+      fontSize: '1.33em',
       lineHeight: '1em',
       verticalAlign: 'middle',
       position: 'relative',
-      top: '-0.32em',
+      top: '-0.35em',
       borderRadius: config.radii.R300,
     },
   ],