wildoperation

Adds a ‘Manage Patterns’ child menu item under the WordPress ‘Appearance’ menu.
This plugin doesn’t provide functionality for managing Patterns. Instead, it provides a shortcut to WordPress’ built-in Pattern management.
No settings. Just enable the plugin, and the menu item will be added.

Add Manage Patterns Menu


Why this function is not core makes no sense to me.Nice easy access to an important part of the wp environment.


Works as designed

Adds a 'Manage Patterns' child menu item under the WordPress 'Appearance' menu.

sevenspark

The new accessibility javascript in the Appearance > Menus panel in WordPress 3.6 can significantly slow the page load speed when using a large number of menu items (> 50). This plugin defers the accessibility processing to eliminate the scripting bottleneck and allow the Appearance > Menus screen to run much faster and more responsively.
<a href="http://sevenspark.com/wordpress/speeding-up-the-appearance-menus-screen-in-wordpress-3-6" rel="nofollow ugc">Full details</a>
This solution is fairly rough. Hopefully we can develop a robust solution that can eventually become part of the core. Pull requests through GitHub are welcome.

Add Manage Patterns Menu vs Faster Appearance – Menus