Remove the list style image from menu list items on sidebar and footer menus (IE7 support)

Just make the following changes to the style.css file. I have also commited these changes and will be included in next Corporate Clean version 7.x-1.2

1. ~line 187
From

.region-sidebar-first ul.menu li { list-style:none; margin:0; padding:0; }

to

.region-sidebar-first ul.menu li { list-style:none; margin:0; padding:0; list-style-image:none; }

1. ~line 312
From

#footer .block ul.menu li { list-style:none; margin:0; padding:0; }

to

#footer .block ul.menu li { list-style:none; margin:0; padding:0; list-style-image:none; }

Thanks
George