Dialog.onShow should occur when the animation ends

[mconner]

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Current behavior

The code emits for onShow shortly after (~10ms) the show animation starts.
Expected behavior

It should occur when the animation ends. I can determine when the show starts because it is based on the visible value, which is under my control. but there is no event emitted when the show animation ends.

Minimal reproduction of the problem with instructions

What is the motivation / use case for changing the behavior?

Please tell us about your environment:

Windows 10

• Angular version: 5.X

• PrimeNG version: 9.X

• Browser: [all | Chrome XX | Firefox XX | IE XX | Safari XX | Mobile Chrome XX | Android X.X Web Browser | iOS XX Safari | iOS XX UIWebView | iOS XX WKWebView ]

Chrome

• Language: [all | TypeScript X.X | ES6/7 | ES5]
  Typescript
• Node (for AoT issues): node --version =