feat: add debounce props

[karlito40]

Hi guys,

This merge request adds a basic debounce on scroll if needed.

Right now i'm experiencing some little perf issues on desktop (and only on desktop) when i scroll too fast to the bottom of my dynamic scroller. Everything become clunky and nearly unusable.

To be fair everything works fine if i use IdState but my use case prevents me from using it without a huge refactor. So i must put a key on my child components inside my DynamicScrollerItem which is a huge performance killer on desktop (not so much on mobile ironically).

As a workaround, i've add a debounce props that will debounce the handleScroll methods if it's not falsy. It's not optimal but it's now usable and does the job for my use case.

Feel free to merge or not.

i renamed refreshTimout to refreshTimeout

[AnastasiosF]

When the conflict will be resolved? I believe that will solve performance issues in mobiles. Scroll-event triggered multiple times when scrolling with touch event and that causes some glitches!

[karlito40]

All the conflicts has been resolved 👍

[Akryum]

It should be a throttle instead of a debounce to avoid blank content for too long while scrolling.