nuke bg image on active/open for buttons for when we add gradients

dist/css/bootstrap.css

@@ -1942,6 +1942,7 @@ textarea.input-lg {
 
 .btn:active,
 .btn.active {
+  background-image: none;
   outline: 0;
   -webkit-box-shadow: inset 0 3px 5px rgba(0, 0, 0, 0.125);
           box-shadow: inset 0 3px 5px rgba(0, 0, 0, 0.125);
@@ -1974,6 +1975,12 @@ fieldset[disabled] .btn {
   border-color: #adadad;
 }
 
+.btn-default:active,
+.btn-default.active,
+.open .dropdown-toggle.btn-default {
+  background-image: none;
+}
+
 .btn-default.disabled,
 .btn-default[disabled],
 fieldset[disabled] .btn-default,
@@ -2009,6 +2016,12 @@ fieldset[disabled] .btn-default.active {
   border-color: #285e8e;
 }
 
+.btn-primary:active,
+.btn-primary.active,
+.open .dropdown-toggle.btn-primary {
+  background-image: none;
+}
+
 .btn-primary.disabled,
 .btn-primary[disabled],
 fieldset[disabled] .btn-primary,
@@ -2044,6 +2057,12 @@ fieldset[disabled] .btn-primary.active {
   border-color: #d58512;
 }
 
+.btn-warning:active,
+.btn-warning.active,
+.open .dropdown-toggle.btn-warning {
+  background-image: none;
+}
+
 .btn-warning.disabled,
 .btn-warning[disabled],
 fieldset[disabled] .btn-warning,
@@ -2079,6 +2098,12 @@ fieldset[disabled] .btn-warning.active {
   border-color: #ac2925;
 }
 
+.btn-danger:active,
+.btn-danger.active,
+.open .dropdown-toggle.btn-danger {
+  background-image: none;
+}
+
 .btn-danger.disabled,
 .btn-danger[disabled],
 fieldset[disabled] .btn-danger,
@@ -2114,6 +2139,12 @@ fieldset[disabled] .btn-danger.active {
   border-color: #398439;
 }
 
+.btn-success:active,
+.btn-success.active,
+.open .dropdown-toggle.btn-success {
+  background-image: none;
+}
+
 .btn-success.disabled,
 .btn-success[disabled],
 fieldset[disabled] .btn-success,
@@ -2149,6 +2180,12 @@ fieldset[disabled] .btn-success.active {
   border-color: #269abc;
 }
 
+.btn-info:active,
+.btn-info.active,
+.open .dropdown-toggle.btn-info {
+  background-image: none;
+}
+
 .btn-info.disabled,
 .btn-info[disabled],
 fieldset[disabled] .btn-info,

less/buttons.less

@@ -35,6 +35,7 @@
   &:active,
   &.active {
     outline: 0;
+    background-image: none;
     .box-shadow(inset 0 3px 5px rgba(0,0,0,.125));
   }
 

less/mixins.less

@@ -418,7 +418,11 @@
     background-color: darken(@background, 8%);
         border-color: darken(@border, 12%);
   }
-
+  &:active,
+  &.active,
+  .open .dropdown-toggle& {
+    background-image: none;
+  }
   &.disabled,
   &[disabled],
   fieldset[disabled] & {