move Dialog analytics to Modal controller

mark title as required, it sorta is, why isn't this based on BaseDialog?

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

src/Modal.js

@@ -19,6 +19,7 @@ limitations under the License.
 
 var React = require('react');
 var ReactDOM = require('react-dom');
+import Analytics from './Analytics';
 import sdk from './index';
 
 const DIALOG_CONTAINER_ID = "mx_Dialog_Container";
@@ -104,6 +105,7 @@ class ModalManager {
     }
 
     createDialog(Element, props, className) {
+        Analytics.trackEvent('Modal', props.title, 'createDialog');
         return this.createDialogAsync((cb) => {cb(Element);}, props, className);
     }
 

src/components/views/dialogs/BaseDialog.js

@@ -16,7 +16,6 @@ limitations under the License.
 
 import React from 'react';
 
-import Analytics from '../../../Analytics';
 import * as KeyCode from '../../../KeyCode';
 import AccessibleButton from '../elements/AccessibleButton';
 import sdk from '../../../index';
@@ -67,7 +66,6 @@ export default React.createClass({
     },
 
     render: function() {
-        Analytics.trackEvent('Dialog', this.props.title, 'mount');
         const TintableSvg = sdk.getComponent("elements.TintableSvg");
 
         return (

src/components/views/dialogs/ChatInviteDialog.js

@@ -34,7 +34,7 @@ const TRUNCATE_QUERY_LIST = 40;
 module.exports = React.createClass({
     displayName: "ChatInviteDialog",
     propTypes: {
-        title: React.PropTypes.string,
+        title: React.PropTypes.string.isRequired,
         description: React.PropTypes.oneOfType([
             React.PropTypes.element,
             React.PropTypes.string,