Move IE10 responsive fix to responsive utilities so Customizer gets it

docs/assets/css/bootstrap-responsive.css

@@ -8,10 +8,6 @@
  * Designed and built with all the love in the world @twitter by @mdo and @fat.
  */
 
-@-ms-viewport {
-  width: device-width;
-}
-
 .clearfix {
   *zoom: 1;
 }

docs/assets/css/bootstrap.css

@@ -6014,6 +6014,10 @@ a.badge:hover {
   line-height: 30px;
 }
 
+@-ms-viewport {
+  width: device-width;
+}
+
 .pull-right {
   float: right;
 }

less/responsive.less

@@ -14,15 +14,6 @@
 // -------------------------------------------------------------
 
 
-// IE10 Metro responsive
-// Required for Windows 8 Metro split-screen snapping with IE10
-// Source: http://timkadlec.com/2012/10/ie10-snap-mode-and-responsive-design/
-
-@-ms-viewport{
-  width: device-width;
-}
-
-
 // REPEAT VARIABLES & MIXINS
 // -------------------------
 // Required since we compile the responsive stuff separately

less/utilities.less

@@ -3,6 +3,13 @@
 // --------------------------------------------------
 
 
+// IE10 Metro responsive
+// Required for Windows 8 Metro split-screen snapping with IE10
+// Source: http://timkadlec.com/2012/10/ie10-snap-mode-and-responsive-design/
+@-ms-viewport{
+  width: device-width;
+}
+
 // Quick floats
 .pull-right {
   float: right;