Adapt_framework: Post page post render event

[canstudios-louisem]

We have an event that gets called once all the render functions on a page have been called it would be great if we have one that is called once all the post render functions have been called.

[oliverfoster]

pageView:ready should do it.

https://github.com/adaptlearning/adapt_framework/wiki/Core-Events#core-views

[brian-learningpool]

@canstudios-louisem, can this be closed?

[canstudios-louisem]

Ill close for now.