Nav dropdown menu should use variable instead of fixed radius

Created by: driesdesmet

In customizing the bootstrap variables I wanted the collapsed navbar dropdown to have no radius. Even though 3 variables are available in variables.less (@baseBorderRadius @borderRadiusLarge and @borderRadiusSmall), the responsive-navbar.less file has a hard-coded radius set to 3px for this element: .nav-collapse .nav > li > a, .nav-collapse .dropdown-menu a (line 72).

My suggestion is to replace that with @borderRadiusSmall, which is set to 3px by default.

Regards,

Dries Desmet.