Navbar brand padding should be calculated with @navbar-height value.

Created by: nextgenthemes

I have seen #6952 (closed) not sure if this was the exact same issue, the answer was that this would be redone in 3.0 but now it's not calculated at all. It's hardcoded to 15px now and I think this should not be this way.

So when I change the @navbar-height: 50px to 35px for example the Brand still has this 15px default padding resulting in forcing the navbar to stay the defaut height and only the navbar-nav is smaller.

This is the default inverse navbar of 3.0 except that the brand has a different font. @navbar-height is 35px and all 3 Items are in active state.