Add withParams for viaRelationship etc support

Author: Brian Dillingham

src/Button.php

@@ -273,6 +273,19 @@ public function route($name, $params)
         return $this;
     }
 
+    /**
+     * Add params to route
+     *
+     * @param  array $params
+     * @return $this
+     */
+    public function withParams(array $params)
+    {
+        $this->route['query'] = array_merge($this->route['query'], $params);
+
+        return $this;
+    }
+
     /**
      * Add filters to index view.
      *