requirements css.php twitter bootstrap update to 2.3.2

yii/requirements/views/web/css.php

@@ -1,6 +1,6 @@
 <style type="text/css">
 /*!
- * Bootstrap v2.3.1
+ * Bootstrap v2.3.2
  *
  * Copyright 2012 Twitter, Inc
  * Licensed under the Apache License v2.0
@@ -2283,6 +2283,7 @@ table th[class*="span"],
   *margin-right: .3em;
   line-height: 14px;
   vertical-align: text-top;
+  background-image: url("../img/glyphicons-halflings.png");
   background-position: 14px 14px;
   background-repeat: no-repeat;
 }
@@ -2305,7 +2306,9 @@ table th[class*="span"],
 .dropdown-submenu:hover > a > [class^="icon-"],
 .dropdown-submenu:focus > a > [class^="icon-"],
 .dropdown-submenu:hover > a > [class*=" icon-"],
-.dropdown-submenu:focus > a > [class*=" icon-"] {}
+.dropdown-submenu:focus > a > [class*=" icon-"] {
+  background-image: url("../img/glyphicons-halflings-white.png");
+}
 
 .icon-glass {
   background-position: 0      0;
@@ -3007,6 +3010,15 @@ table th[class*="span"],
   display: block;
 }
 
+.dropdown-backdrop {
+  position: fixed;
+  top: 0;
+  right: 0;
+  bottom: 0;
+  left: 0;
+  z-index: 990;
+}
+
 .pull-right > .dropdown-menu {
   right: 0;
   left: auto;