Fix SVG download URL resolution for IE/Edge

Author: Abhishek Reddy

src/snapshot/filesaver.js

@@ -53,7 +53,11 @@ var fileSaver = function(url, name) {
 
         // IE 10+ (native saveAs)
         if(typeof navigator !== 'undefined' && navigator.msSaveBlob) {
-            navigator.msSaveBlob(new Blob([url]), name);
+            // At this point we are only dealing with a SVG encoded as
+            // a data URL (since IE only supports SVG)
+            var encoded = url.split(/^data:image\/svg\+xml,/)[1];
+            var svg = decodeURIComponent(encoded);
+            navigator.msSaveBlob(new Blob([svg]), name);
             resolve(name);
         }