Add disabled states to navs and dropdowns

Created by: cnicodeme

Hey, I didn't find any style for disabled state of links in a nav, so here it is :

.nav-list>.disabled>a {
    color: #999;
    cursor: default;
}

.nav-list>.disabled>a:hover {
    background-color: transparent;
}

(update: changing .nav to .nav-list).

This also works for .nav-tabs & .nav-pills :

.nav-tabs>.disabled>a, .nav-pills>.disabled>a {
    color: #999;
    cursor: default;
    border: none; /** add this for tabs/pills **/
}

.nav-tabs>.disabled>a:hover, .nav-pills>.disabled>a:hover {
    background-color: transparent;
}