update assets from bootstrap@3.3.7

assets/less/bootstrap/responsive-utilities.less

@@ -1,7 +1,10 @@
+// stylelint-disable declaration-no-important, at-rule-no-vendor-prefix
+
 //
 // Responsive: Utility classes
 // --------------------------------------------------
 
+
 // IE10 in Windows (Phone) 8
 //
 // Support for responsive views via media queries is kind of borked in IE10, for
@@ -13,14 +16,15 @@
 // For more information, see the following:
 //
 // Issue: https://github.com/twbs/bootstrap/issues/10497
-// Docs: http://getbootstrap.com/getting-started/#support-ie10-width
-// Source: http://timkadlec.com/2013/01/windows-phone-8-and-device-width/
-// Source: http://timkadlec.com/2012/10/ie10-snap-mode-and-responsive-design/
+// Docs: https://getbootstrap.com/docs/3.4/getting-started/#support-ie10-width
+// Source: https://timkadlec.com/2013/01/windows-phone-8-and-device-width/
+// Source: https://timkadlec.com/2012/10/ie10-snap-mode-and-responsive-design/
 
 @-ms-viewport {
   width: device-width;
 }
 
+
 // Visibility utilities
 // Note: Deprecated .visible-xs, .visible-sm, .visible-md, and .visible-lg as of v3.2.0
 .visible-xs,
@@ -150,6 +154,7 @@
   }
 }
 
+
 // Print utilities
 //
 // Media queries are placed on the inside to be mixin-friendly.