Merge branch '2.2.2-wip' into exploratory

Conflicts:
	docs/assets/css/bootstrap.css
	less/buttons.less
	less/forms.less

less/buttons.less

@@ -26,7 +26,6 @@
   &:hover {
     color: @grayDark;
     text-decoration: none;
-    background-color: darken(@white, 10%);
     background-position: 0 -15px;
 
     // transition is only when going to hover, otherwise the background
@@ -42,8 +41,6 @@
   // Active state
   &.active,
   &:active {
-    background-color: darken(@white, 10%);
-    background-color: darken(@white, 15%) e("\9");
     background-image: none;
     outline: 0;
     .box-shadow(~"inset 0 2px 4px rgba(0,0,0,.15), 0 1px 2px rgba(0,0,0,.05)");
@@ -53,7 +50,6 @@
   &.disabled,
   &[disabled] {
     cursor: default;
-    background-color: darken(@white, 10%);
     background-image: none;
     .opacity(65);
     .box-shadow(none);

less/code.less

@@ -19,6 +19,7 @@ code {
   color: #d14;
   background-color: #f7f7f9;
   border: 1px solid #e1e1e8;
+  white-space: nowrap;
 }
 
 // Blocks of code

less/dropdowns.less

@@ -214,5 +214,6 @@
 // Typeahead
 // ---------
 .typeahead {
+  z-index: 1051;
   margin-top: 2px; // give it some space to breathe
 }

less/forms.less

@@ -388,9 +388,9 @@ input[type="checkbox"][readonly] {
 
 // HTML5 invalid states
 // Shares styles with the .control-group.error above
-input:focus:required:invalid,
-textarea:focus:required:invalid,
-select:focus:required:invalid {
+input:focus:invalid,
+textarea:focus:invalid,
+select:focus:invalid {
   color: #b94a48;
   border-color: #ee5f5b;
   &:focus {
@@ -489,7 +489,8 @@ select:focus:required:invalid {
     border: 1px solid #ccc;
   }
   .add-on,
-  .btn {
+  .btn,
+  .btn-group > .dropdown-toggle {
     vertical-align: top;
     border-radius: 0;
   }
@@ -516,7 +517,8 @@ select:focus:required:invalid {
   select,
   .uneditable-input {
     border-radius: @inputBorderRadius 0 0 @inputBorderRadius;
-    + .btn-group .btn {
+    + .btn-group .btn,
+    + .btn-group .btn:last-child {
       border-radius: 0 @inputBorderRadius @inputBorderRadius 0;
     }
   }
@@ -526,7 +528,8 @@ select:focus:required:invalid {
     margin-left: -1px;
   }
   .add-on:last-child,
-  .btn:last-child {
+  .btn:last-child,
+  .btn-group:last-child > .dropdown-toggle {
     border-radius: 0 @inputBorderRadius @inputBorderRadius 0;
   }
 }