Upgrade to Bootstrap 3.1

public/css/lib/bootstrap/button-groups.less

@@ -2,37 +2,6 @@
 // Button groups
 // --------------------------------------------------
 
-// Button carets
-//
-// Match the button text color to the arrow/caret for indicating dropdown-ness.
-
-.caret {
-  .btn-default & {
-    border-top-color: @btn-default-color;
-  }
-  .btn-primary &,
-  .btn-success &,
-  .btn-warning &,
-  .btn-danger &,
-  .btn-info & {
-    border-top-color: #fff;
-  }
-}
-.dropup {
-  .btn-default .caret {
-    border-bottom-color: @btn-default-color;
-  }
-  .btn-primary,
-  .btn-success,
-  .btn-warning,
-  .btn-danger,
-  .btn-info {
-   .caret {
-      border-bottom-color: #fff;
-    }
-  }
-}
-
 // Make the div behave like a button
 .btn-group,
 .btn-group-vertical {
@@ -68,18 +37,17 @@
 
 // Optional: Group multiple button groups together for a toolbar
 .btn-toolbar {
-  .clearfix();
+  margin-left: -5px; // Offset the first child's margin
+  &:extend(.clearfix all);
 
-  .btn-group {
+  .btn-group,
+  .input-group {
     float: left;
   }
-  // Space out series of button groups
   > .btn,
-  > .btn-group {
-    + .btn,
-    + .btn-group {
-      margin-left: 5px;
-    }
+  > .btn-group,
+  > .input-group {
+    margin-left: 5px;
   }
 }
 
@@ -178,7 +146,8 @@
 
 .btn-group-vertical {
   > .btn,
-  > .btn-group {
+  > .btn-group,
+  > .btn-group > .btn {
     display: block;
     float: none;
     width: 100%;
@@ -187,7 +156,7 @@
 
   // Clear floats so dropdown menus can be properly placed
   > .btn-group {
-    .clearfix();
+    &:extend(.clearfix all);
     > .btn {
       float: none;
     }
@@ -218,13 +187,13 @@
 .btn-group-vertical > .btn-group:not(:first-child):not(:last-child) > .btn {
   border-radius: 0;
 }
-.btn-group-vertical > .btn-group:first-child {
+.btn-group-vertical > .btn-group:first-child:not(:last-child) {
   > .btn:last-child,
   > .dropdown-toggle {
     .border-bottom-radius(0);
   }
 }
-.btn-group-vertical > .btn-group:last-child > .btn:first-child {
+.btn-group-vertical > .btn-group:last-child:not(:first-child) > .btn:first-child {
   .border-top-radius(0);
 }
 
@@ -238,11 +207,15 @@
   width: 100%;
   table-layout: fixed;
   border-collapse: separate;
-  .btn {
+  > .btn,
+  > .btn-group {
     float: none;
     display: table-cell;
     width: 1%;
   }
+  > .btn-group .btn {
+    width: 100%;
+  }
 }