fix(navigation): reduce urls to minimum set of fields

* wip

* simple-nav, simple-tabs, simple-nav-then-tabs, simple-nested-navs all pass w00t w00t

* updates

* fix tests

* update test

src/components/tabs/tabs.ts

@@ -507,6 +507,13 @@ export class Tabs extends Ion implements AfterViewInit, RootNode, ITabs, Navigat
     return selected ? [selected] : [];
   }
 
+  /**
+   * @internal
+   */
+  getAllChildNavs(): any[] {
+    return this._tabs;
+  }
+
   /**
    * @internal
    */