input-append with btn-group has incorrect margin in navbar

[chronossc]

I'm making a second navbar here for some buttons and saw that input-append input with button dropdown (like example in docs) does not works. This css is issue:

.navbar .btn, .navbar .btn-group {
margin-top: 5px;
}

Guess if we have something like:

.navbar .input-append .btn, .navbar .input-append .btn-group {
margin-top: 0;
}

can be fixed.

There is a image to show error:

[mdo]

Removed the top margin in #6346.