Do not autofocus text fields on page load on mobile devices. This is currently broken in many mobile browsers:

- iOS Safari opens the keyboard and auto-scrolls on the first tap anywhere on the screen triggering the click at an unexpected place. That makes it impossible to follow links or press buttons.
- Chrome on iOS opens the keyboard on load and may scroll the focused field off screen.
- The Android 4.4 browser only highlights the field, the user has to tap it to open the keyboard and type.

Merges [30842] to the 4.1 branch.

See #30703.

Built from https://develop.svn.wordpress.org/branches/4.1@30908


git-svn-id: http://core.svn.wordpress.org/branches/4.1@30898 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/edit-form-advanced.php

@@ -647,7 +647,7 @@ if ( post_type_supports( $post_type, 'comments' ) )
 	wp_comment_reply();
 ?>
 
-<?php if ( post_type_supports( $post_type, 'title' ) && '' === $post->post_title ) : ?>
+<?php if ( ! wp_is_mobile() && post_type_supports( $post_type, 'title' ) && '' === $post->post_title ) : ?>
 <script type="text/javascript">
 try{document.post.title.focus();}catch(e){}
 </script>

wp-admin/edit-form-comment.php

@@ -155,6 +155,8 @@ do_meta_boxes(null, 'normal', $comment);
 </div>
 </form>
 
+<?php if ( ! wp_is_mobile() ) : ?>
 <script type="text/javascript">
 try{document.post.name.focus();}catch(e){}
 </script>
+<?php endif;

wp-admin/edit-tag-form.php

@@ -200,6 +200,9 @@ submit_button( __('Update') );
 ?>
 </form>
 </div>
+
+<?php if ( ! wp_is_mobile() ) : ?>
 <script type="text/javascript">
 try{document.forms.edittag.name.focus();}catch(e){}
 </script>
+<?php endif;

wp-admin/edit-tags.php

@@ -583,10 +583,14 @@ do_action( "{$taxonomy}_add_form", $taxonomy );
 
 </div><!-- /col-container -->
 </div><!-- /wrap -->
+
+<?php if ( ! wp_is_mobile() ) : ?>
 <script type="text/javascript">
 try{document.forms.addtag['tag-name'].focus();}catch(e){}
 </script>
 <?php
+endif;
+
 $wp_list_table->inline_edit();
 
 include( ABSPATH . 'wp-admin/admin-footer.php' );