Revert "fix(ng1.uiSref): Allow nested UISrefs by stopping event propagation on-click"

This reverts commit b4a2499.
Closes #2962

Author: christopherthielen

src/ng1/directives/stateDirectives.ts

@@ -67,7 +67,6 @@ function clickHook(el: IAugmentedJQuery, $state: StateService, $timeout: ITimeou
         $state.go(target.state, target.params, target.options);
       });
       e.preventDefault();
-      e.stopPropagation();
 
       // if the state has no URL, ignore one preventDefault from the <a> directive.
       var ignorePreventDefaultCount = type.isAnchor && !target.href ? 1: 0;