fix(ngAnimate): ensure that delays are always considered before an animation closes

[matsko]

Closes #4028

[mary-poppins]

Thanks for the PR!

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Thanks again for your help!

[mgol]

@matsko This is going to conflict with #3908... :( Could you merge it? Rebasing such things is tedious.

[matsko]

@mzgol going to have this merged in first and then I'll do the rebase on your code.

[mgol]

@matsko Thanks! :)

[matsko]

MERGED

Landed as 0a63adc

[mgol]

@matsko Oh, so you didn't rebase on my PR after all. Any reason why?

[matsko]

Getting to it :) Will be rebased soon.