Fixes #14074: Make open dropdown nav links in navbar use gradients

dist/css/bootstrap-theme.css

@@ -223,6 +223,7 @@
   -webkit-box-shadow: inset 0 1px 0 rgba(255, 255, 255, .15), 0 1px 5px rgba(0, 0, 0, .075);
           box-shadow: inset 0 1px 0 rgba(255, 255, 255, .15), 0 1px 5px rgba(0, 0, 0, .075);
 }
+.navbar-default .navbar-nav > .open > a,
 .navbar-default .navbar-nav > .active > a {
   background-image: -webkit-linear-gradient(top, #ebebeb 0%, #f3f3f3 100%);
   background-image:      -o-linear-gradient(top, #ebebeb 0%, #f3f3f3 100%);
@@ -246,6 +247,7 @@
   filter: progid:DXImageTransform.Microsoft.gradient(enabled = false);
   background-repeat: repeat-x;
 }
+.navbar-inverse .navbar-nav > .open > a,
 .navbar-inverse .navbar-nav > .active > a {
   background-image: -webkit-linear-gradient(top, #222 0%, #282828 100%);
   background-image:      -o-linear-gradient(top, #222 0%, #282828 100%);

docs/dist/css/bootstrap-theme.css

@@ -223,6 +223,7 @@
   -webkit-box-shadow: inset 0 1px 0 rgba(255, 255, 255, .15), 0 1px 5px rgba(0, 0, 0, .075);
           box-shadow: inset 0 1px 0 rgba(255, 255, 255, .15), 0 1px 5px rgba(0, 0, 0, .075);
 }
+.navbar-default .navbar-nav > .open > a,
 .navbar-default .navbar-nav > .active > a {
   background-image: -webkit-linear-gradient(top, #ebebeb 0%, #f3f3f3 100%);
   background-image:      -o-linear-gradient(top, #ebebeb 0%, #f3f3f3 100%);
@@ -246,6 +247,7 @@
   filter: progid:DXImageTransform.Microsoft.gradient(enabled = false);
   background-repeat: repeat-x;
 }
+.navbar-inverse .navbar-nav > .open > a,
 .navbar-inverse .navbar-nav > .active > a {
   background-image: -webkit-linear-gradient(top, #222 0%, #282828 100%);
   background-image:      -o-linear-gradient(top, #222 0%, #282828 100%);

less/theme.less

@@ -116,6 +116,7 @@
   @shadow: inset 0 1px 0 rgba(255,255,255,.15), 0 1px 5px rgba(0,0,0,.075);
   .box-shadow(@shadow);
 
+  .navbar-nav > .open > a,
   .navbar-nav > .active > a {
     #gradient > .vertical(@start-color: darken(@navbar-default-bg, 5%); @end-color: darken(@navbar-default-bg, 2%));
     .box-shadow(inset 0 3px 9px rgba(0,0,0,.075));
@@ -131,6 +132,7 @@
   #gradient > .vertical(@start-color: lighten(@navbar-inverse-bg, 10%); @end-color: @navbar-inverse-bg);
   .reset-filter(); // Remove gradient in IE<10 to fix bug where dropdowns don't get triggered
 
+  .navbar-nav > .open > a,
   .navbar-nav > .active > a {
     #gradient > .vertical(@start-color: @navbar-inverse-bg; @end-color: lighten(@navbar-inverse-bg, 2.5%));
     .box-shadow(inset 0 3px 9px rgba(0,0,0,.25));