Refactor character counter to match upstream

app/javascript/flavours/glitch/features/compose/components/upload_progress.js

@@ -2,7 +2,6 @@ import React from 'react';
 import PropTypes from 'prop-types';
 import Motion from 'flavours/glitch/util/optional_motion';
 import spring from 'react-motion/lib/spring';
-import { FormattedMessage } from 'react-intl';
 import Icon from 'flavours/glitch/components/icon';
 
 export default class UploadProgress extends React.PureComponent {
@@ -10,10 +9,12 @@ export default class UploadProgress extends React.PureComponent {
   static propTypes = {
     active: PropTypes.bool,
     progress: PropTypes.number,
+    icon: PropTypes.string.isRequired,
+    message: PropTypes.node.isRequired,
   };
 
   render () {
-    const { active, progress } = this.props;
+    const { active, progress, icon, message } = this.props;
 
     if (!active) {
       return null;
@@ -21,10 +22,10 @@ export default class UploadProgress extends React.PureComponent {
 
     return (
       <div className='composer--upload_form--progress'>
-        <Icon icon='upload' />
+        <Icon icon={icon} />
 
         <div className='message'>
-          <FormattedMessage id='upload_progress.label' defaultMessage='Uploading...' />
+          {message}
 
           <div className='backdrop'>
             <Motion defaultStyle={{ width: 0 }} style={{ width: spring(progress) }}>