Add option to reduce motion (#5393)

* Add option to reduce motion

* Use HOC to wrap all Motion calls

* fix case-sensitive issue

* Avoid updating too frequently

* Get rid of unnecessary change to _simple_status.html.haml

app/javascript/mastodon/features/compose/components/upload_progress.js

@@ -1,6 +1,6 @@
 import React from 'react';
 import PropTypes from 'prop-types';
-import Motion from 'react-motion/lib/Motion';
+import Motion from '../../ui/util/optional_motion';
 import spring from 'react-motion/lib/spring';
 import { FormattedMessage } from 'react-intl';