Update escaping function in Selector model. Fixes #325

src/selector_manager/model/Selector.js

@@ -62,7 +62,7 @@ const Selector = Backbone.Model.extend({
    * @private
    */
   escapeName(name) {
-    return `${name}`.trim().replace(/([^a-z0-9\w]+)/gi, '-');
+    return `${name}`.trim().replace(/([^a-z0-9\w-]+)/gi, '-');
   },
 });