fix up inverse navbar form styles

dist/css/bootstrap.css

@@ -3400,6 +3400,8 @@ button.close {
   margin-left: -15px;
   border-top: 1px solid #e6e6e6;
   border-bottom: 1px solid #e6e6e6;
+  -webkit-box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1), 0 1px 0 rgba(255, 255, 255, 0.1);
+          box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1), 0 1px 0 rgba(255, 255, 255, 0.1);
 }
 
 @media (min-width: 768px) {
@@ -3439,6 +3441,8 @@ button.close {
     margin-right: 0;
     margin-left: 0;
     border: 0;
+    -webkit-box-shadow: none;
+            box-shadow: none;
   }
 }
 
@@ -3560,8 +3564,9 @@ button.close {
   background-color: #ffffff;
 }
 
-.navbar-inverse .navbar-collapse {
-  border-top-color: #101010;
+.navbar-inverse .navbar-collapse,
+.navbar-inverse .navbar-form {
+  border-color: #101010;
 }
 
 .navbar-inverse .navbar-nav > .open > a,

less/navbar.less

@@ -306,6 +306,8 @@
   padding: 10px @navbar-padding-horizontal;
   border-top: 1px solid darken(@navbar-bg, 7%);
   border-bottom: 1px solid darken(@navbar-bg, 7%);
+  @shadow: inset 0 1px 0 rgba(255,255,255,.1), 0 1px 0 rgba(255,255,255,.1);
+  .box-shadow(@shadow);
 
   // Mixin behavior for optimum display
   .form-inline();
@@ -327,6 +329,7 @@
     margin-right: 0;
     padding-top: 0;
     padding-bottom: 0;
+    .box-shadow(none);
   }
 }
 
@@ -472,8 +475,9 @@
     }
   }
 
-  .navbar-collapse {
-    border-top-color: darken(@navbar-inverse-bg, 7%);
+  .navbar-collapse,
+  .navbar-form {
+    border-color: darken(@navbar-inverse-bg, 7%);
   }
 
   // Dropdowns