ACP2E-3149: Double slashes in customer segment URL

Author: lakshmana49

lib/web/mage/adminhtml/grid.js

@@ -370,8 +370,12 @@ define([
                 parts = url.split(new RegExp('\\?'));
 
             url = parts[0].replace(re, '/');
-            url += varName + '/' + varValue + '/';
-
+            if (varName) {
+                url += varName + '/';
+            }
+            if (varValue) {
+                url += varValue + '/';
+            }
             if (parts.size() > 1) {
                 url += '?' + parts[1];
             }