fixes #9642: open dropdown nav items get proper styling

dist/css/bootstrap.css

@@ -2978,21 +2978,13 @@ button.close {
   background-color: transparent;
 }
 
-.nav.open > a,
-.nav.open > a:hover,
-.nav.open > a:focus {
-  color: #ffffff;
-  background-color: #428bca;
+.nav .open > a,
+.nav .open > a:hover,
+.nav .open > a:focus {
+  background-color: #eeeeee;
   border-color: #428bca;
 }
 
-.nav.open > a .caret,
-.nav.open > a:hover .caret,
-.nav.open > a:focus .caret {
-  border-top-color: #ffffff;
-  border-bottom-color: #ffffff;
-}
-
 .nav .nav-divider {
   height: 1px;
   margin: 9px 0;

less/navs.less

@@ -42,17 +42,12 @@
   }
 
   // Open dropdowns
-  &.open > a {
+  .open > a {
     &,
     &:hover,
     &:focus {
-      color: @nav-open-link-hover-color;
-      background-color: @link-color;
+      background-color: @nav-link-hover-bg;
       border-color: @link-color;
-      .caret {
-        border-top-color: @nav-open-caret-border-color;
-        border-bottom-color: @nav-open-caret-border-color;
-      }
     }
   }