With focustrap for dialog you cannot tab past hidden or disabled elements

[gwoplock]

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Plunkr Case (Bug Reports)
Please demonstrate your case at stackblitz by using the issue template below. Issues without a test case have much less possibility to be reviewd in detail and assisted.

https://stackblitz.com/edit/primeng-captive-tab-hidden-bug

Current behavior
using the dialog captive tab, if there is a hidden or disabled element that should be tabbed to next it won't move the focus.

Expected behavior
skip disabled and hidden elements when tabbing in dialog

Minimal reproduction of the problem with instructions

demo:
https://stackblitz.com/edit/primeng-captive-tab-hidden-bug

using demo:

1. click button
2. try tabbing in dialog
3. notice that you can not tab to cancel

Please tell us about your environment:

windows 10

• Angular version: 7.2.8

• PrimeNG version: 7.1.1

• Browser: tested in chrome and firefox, both are reproducible with the stackblitz. haven't tried others

• Language: typescript 3.1.1

[cagataycivici]

Fixed via PR