fixes #9647: ensure open dropdown toggles get .active styles

dist/css/bootstrap.css

@@ -1967,7 +1967,8 @@ fieldset[disabled] .btn {
 .btn-default:hover,
 .btn-default:focus,
 .btn-default:active,
-.btn-default.active {
+.btn-default.active,
+.open .dropdown-toggle.btn-default {
   color: #333333;
   background-color: #ebebeb;
   border-color: #adadad;
@@ -2001,7 +2002,8 @@ fieldset[disabled] .btn-default.active {
 .btn-primary:hover,
 .btn-primary:focus,
 .btn-primary:active,
-.btn-primary.active {
+.btn-primary.active,
+.open .dropdown-toggle.btn-primary {
   color: #ffffff;
   background-color: #3276b1;
   border-color: #285e8e;
@@ -2035,7 +2037,8 @@ fieldset[disabled] .btn-primary.active {
 .btn-warning:hover,
 .btn-warning:focus,
 .btn-warning:active,
-.btn-warning.active {
+.btn-warning.active,
+.open .dropdown-toggle.btn-warning {
   color: #ffffff;
   background-color: #ed9c28;
   border-color: #d58512;
@@ -2069,7 +2072,8 @@ fieldset[disabled] .btn-warning.active {
 .btn-danger:hover,
 .btn-danger:focus,
 .btn-danger:active,
-.btn-danger.active {
+.btn-danger.active,
+.open .dropdown-toggle.btn-danger {
   color: #ffffff;
   background-color: #d2322d;
   border-color: #ac2925;
@@ -2103,7 +2107,8 @@ fieldset[disabled] .btn-danger.active {
 .btn-success:hover,
 .btn-success:focus,
 .btn-success:active,
-.btn-success.active {
+.btn-success.active,
+.open .dropdown-toggle.btn-success {
   color: #ffffff;
   background-color: #47a447;
   border-color: #398439;
@@ -2137,7 +2142,8 @@ fieldset[disabled] .btn-success.active {
 .btn-info:hover,
 .btn-info:focus,
 .btn-info:active,
-.btn-info.active {
+.btn-info.active,
+.open .dropdown-toggle.btn-info {
   color: #ffffff;
   background-color: #39b3d7;
   border-color: #269abc;

less/mixins.less

@@ -412,7 +412,8 @@
   &:hover,
   &:focus,
   &:active,
-  &.active {
+  &.active,
+  .open .dropdown-toggle& {
     color: @color;
     background-color: darken(@background, 8%);
         border-color: darken(@border, 12%);