Refactoring the CollectionControls component

The CollectionControls component gets some major improvements as well. Let's take a look at the refactored version first, and then discuss what was updated and why:

var React = require('react');
var Header = require('./Header.react');
var Button = require('./Button.react');
var CollectionRenameForm = require('./CollectionRenameForm.react');
var CollectionExportForm = require('./CollectionExportForm.react');
var CollectionActionCreators = require('../actions/CollectionActionCreators');
var CollectionStore = require('../stores/CollectionStore');

var CollectionControls = React.createClass({

  getInitialState: function () {
    return {
      isEditingName: false
    };
  },

  getHeaderText: function () {
    var numberOfTweetsInCollection = this.props.numberOfTweetsInCollection;
    var text = numberOfTweetsInCollection;
    var name = CollectionStore.getCollectionName();

    if (numberOfTweetsInCollection === 1) {
      text = text + ' tweet...