Making upload button into a smaller icon button

app/assets/javascripts/components/features/compose/components/character_counter.jsx

@@ -0,0 +1,24 @@
+import PureRenderMixin from 'react-addons-pure-render-mixin';
+
+const CharacterCounter = React.createClass({
+
+  propTypes: {
+    text: React.PropTypes.string.isRequired,
+    max: React.PropTypes.number.isRequired
+  },
+
+  mixins: [PureRenderMixin],
+
+  render () {
+    const diff = this.props.max - this.props.text.length;
+
+    return (
+      <span style={{ fontSize: '16px', cursor: 'default' }}>
+        {diff}
+      </span>
+    );
+  }
+
+});
+
+export default CharacterCounter;