Dashboard:

- Close the form after obtaining a valid location.
- Fix focusing the toggle button after closing the form.
- Fix aria attribute values.
- Fix positions in IE11.
- Some JS and CSS cleanup.

Props afercia, coreymckrill.
Fixes #40735.
Built from https://develop.svn.wordpress.org/trunk@40789


git-svn-id: http://core.svn.wordpress.org/trunk@40647 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/dashboard.php

@@ -1173,7 +1173,7 @@ function wp_print_community_events_markup() {
 
 				<?php submit_button( __( 'Submit' ), 'secondary', 'community-events-submit', false ); ?>
 
-				<button class="community-events-cancel button button-link" type="button" aria-expanded="false">
+				<button class="community-events-cancel button-link" type="button" aria-expanded="false">
 					<?php _e( 'Cancel' ); ?>
 				</button>