diff --git a/core/vendor/core.js b/core/vendor/core.js
index 4dec5d5684..f0b0983615 100644
--- a/core/vendor/core.js
+++ b/core/vendor/core.js
@@ -10197,3 +10197,13 @@ the specific language governing permissions and limitations under the Apache Lic
 
 }(jQuery));
 
+/*!
+ * css-vars-ponyfill
+ * v1.7.2
+ * https://github.com/jhildenbiddle/css-vars-ponyfill
+ * (c) 2018 John Hildenbiddle <http://hildenbiddle.com>
+ * MIT license
+ */
+!function(e,n){"object"==typeof exports&&"undefined"!=typeof module?module.exports=n():"function"==typeof define&&define.amd?define(n):e.cssVars=n()}(this,function(){"use strict";function e(e){var n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{},r={mimeType:n.mimeType||null,onBeforeSend:n.onBeforeSend||Function.prototype,onSuccess:n.onSuccess||Function.prototype,onError:n.onError||Function.prototype,onComplete:n.onComplete||Function.prototype},t=Array.isArray(e)?e:[e],o=Array.apply(null,Array(t.length)).map(function(e){return null});function s(e,n){r.onError(e,t[n],n)}function a(e,n){var s=r.onSuccess(e,t[n],n);e=!1===s?"":s||e,o[n]=e,-1===o.indexOf(null)&&r.onComplete(o)}t.forEach(function(e,n){var t=document.createElement("a");t.setAttribute("href",e),t.href=t.href;var o=t.host!==location.host,i=t.protocol===location.protocol;if(o&&"undefined"!=typeof XDomainRequest)if(i){var u=new 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+
+