Rename areStatesEqual to areObjectsEqual and make it more comprehensive and accurate.

web/react/components/posts_view.jsx

@@ -240,7 +240,7 @@ export default class PostsView extends React.Component {
         if (this.props.messageSeparatorTime !== nextProps.messageSeparatorTime) {
             return true;
         }
-        if (!Utils.areStatesEqual(this.props.postList, nextProps.postList)) {
+        if (!Utils.areObjectsEqual(this.props.postList, nextProps.postList)) {
             return true;
         }