Rewrite admin. (#1713)

* Rewrite admin.

* Clean up password forms.

* Fix naming issues.

* CSS Naming.

components/common/CopyButton.js

@@ -1,6 +1,6 @@
 import React, { useState } from 'react';
 import PropTypes from 'prop-types';
-import Button from './Button';
+import { Button } from 'react-basics';
 import { FormattedMessage } from 'react-intl';
 
 const defaultText = (