A few changes for 3.9.1

Hi there. Love the plugin, just installed it on 3.9.1 and saw a few things that needed an updated. I'm happy to discuss any of these changes if you would like.

Changes:

Styles were not playing well with 3.9 on the widgets page. I changed
them to be borders and moved them up a level in the html to wrap the
whole widget box. See comments in the js for details

Added a settings page shortcut from the plugins.php page