Improve `componentOnReady` suggestion note for non-lazy builds

[jcfranco]

The doc for componentOnReady recommends Ionic's similarly-named util for consistent behavior between lazy and non-lazy-loaded builds:

If you want to simulate the behavior of componentOnReady() for non-lazy builds, you can implement a helper method to wrap the functionality similar to what the Ionic Framework does here.

A note should be added this being similar in functionality in the non-lazy-loaded builds only if none of the component lifecycle methods return a promise. Otherwise, the callback will resolve after a requestAnimationFrame, but possibly before async component lifecycle methods resolve.

[christian-bromann]

@jcfranco thanks for raising an issue for this. Would you be interested making such a change in the docs as you have most context about it? Happy to support where help is needed.

[jcfranco]

I'd be glad to help, but I'm not clear on what to suggest as an alternative to the Ionic util for these cases.