Add scrollTop method to ScrollPanel

[cyberrranger]

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[*] feature request => Please check if request is not on the roadmap already https://github.com/primefaces/primeng/wiki/Roadmap

https://www.primefaces.org/primeng/#/scrollpanel

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

i use p-table in a scrollpanel, and if a user open the page with the scrollpanel the content should scroll to top, i used this with:

constructor(@Inject(DOCUMENT) private document: Document) {

setTimeout(() => { let scroll = this.document.body.getElementsByClassName("ui-scrollpanel-content")[0]; if (scroll) { scroll.scrollTop = scroll.scrollHeight; } }, 1000);

• Angular version: 5.X

• PrimeNG version: 5.X

• Browser: [all ]

• Language: [all]