fix #2829: redeclare .pull-right for navs since they get more specific floats

docs/assets/css/bootstrap.css

@@ -2557,6 +2557,9 @@ input[type="submit"].btn.btn-mini {
   text-decoration: none;
   background-color: #eeeeee;
 }
+.nav > .pull-right {
+  float: right;
+}
 .nav .nav-header {
   display: block;
   padding: 3px 15px;

less/navs.less

@@ -21,6 +21,11 @@
   background-color: @grayLighter;
 }
 
+// Redeclare pull classes because of specifity
+.nav > .pull-right {
+  float: right;
+}
+
 // Nav headers (for dropdowns and lists)
 .nav .nav-header {
   display: block;