enable button groups in vertical button groups

components.html

@@ -230,7 +230,7 @@ base_url: "../"
     <h3 id="btn-groups-vertical">Vertical button groups</h3>
     <p>Make a set of buttons appear vertically stacked rather than horizontally.</p>
     <div class="bs-example">
-      <div class="btn-group btn-group-vertical">
+      <div class="btn-group-vertical">
         <button type="button" class="btn btn-default">Button</button>
         <button type="button" class="btn btn-default">Button</button>
         <div class="btn-group">
@@ -265,6 +265,16 @@ base_url: "../"
             <li><a href="#">Dropdown link</a></li>
           </ul>
         </div>
+        <div class="btn-group">
+          <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown">
+            Dropdown
+            <span class="caret"></span>
+          </button>
+          <ul class="dropdown-menu">
+            <li><a href="#">Dropdown link</a></li>
+            <li><a href="#">Dropdown link</a></li>
+          </ul>
+        </div>
       </div>
     </div>
 {% highlight html %}

dist/css/bootstrap.css

@@ -3559,10 +3559,34 @@ button.close {
   max-width: 100%;
 }
 
-.btn-group-vertical .btn + .btn,
-.btn-group-vertical .btn + .btn-group,
-.btn-group-vertical .btn-group + .btn,
-.btn-group-vertical .btn-group + .btn-group {
+.btn-group-vertical > .btn-group:before,
+.btn-group-vertical > .btn-group:after {
+  display: table;
+  content: " ";
+}
+
+.btn-group-vertical > .btn-group:after {
+  clear: both;
+}
+
+.btn-group-vertical > .btn-group:before,
+.btn-group-vertical > .btn-group:after {
+  display: table;
+  content: " ";
+}
+
+.btn-group-vertical > .btn-group:after {
+  clear: both;
+}
+
+.btn-group-vertical > .btn-group > .btn {
+  float: none;
+}
+
+.btn-group-vertical > .btn + .btn,
+.btn-group-vertical > .btn + .btn-group,
+.btn-group-vertical > .btn-group + .btn,
+.btn-group-vertical > .btn-group + .btn-group {
   margin-top: -1px;
   margin-left: 0;
 }
@@ -3589,14 +3613,12 @@ button.close {
 
 .btn-group-vertical > .btn-group:first-child > .btn:last-child,
 .btn-group-vertical > .btn-group:first-child > .dropdown-toggle {
-  border-top-right-radius: 4px;
   border-bottom-right-radius: 0;
   border-bottom-left-radius: 0;
 }
 
 .btn-group-vertical > .btn-group:last-child > .btn:first-child {
   border-top-right-radius: 0;
-  border-bottom-left-radius: 4px;
   border-top-left-radius: 0;
 }
 

less/button-groups.less

@@ -168,18 +168,27 @@
 // Vertical button groups
 // ----------------------
 
-.btn-group-vertical > .btn,
-.btn-group-vertical > .btn-group {
-  display: block;
-  float: none;
-  width: 100%;
-  max-width: 100%;
-}
 .btn-group-vertical {
-  .btn + .btn,
-  .btn + .btn-group,
-  .btn-group + .btn,
-  .btn-group + .btn-group {
+  > .btn,
+  > .btn-group {
+    display: block;
+    float: none;
+    width: 100%;
+    max-width: 100%;
+  }
+
+  // Clear floats so dropdown menus can be properly placed
+  > .btn-group {
+    .clearfix();
+    > .btn {
+      float: none;
+    }
+  }
+
+  > .btn + .btn,
+  > .btn + .btn-group,
+  > .btn-group + .btn,
+  > .btn-group + .btn-group {
     margin-top: -1px;
     margin-left: 0;
   }
@@ -204,12 +213,10 @@
 .btn-group-vertical > .btn-group:first-child {
   > .btn:last-child,
   > .dropdown-toggle {
-    border-top-right-radius: @border-radius-base;
     .border-bottom-radius(0);
   }
 }
 .btn-group-vertical > .btn-group:last-child > .btn:first-child {
-  border-bottom-left-radius: @border-radius-base;
   .border-top-radius(0);
 }