Allow setting of auto scroll config

[shruti8789]

Still in very early stages of fiddling around. But it is fun to play with!

@alexreardon
Here, we can see a definite area after which it starts to auto-scroll (both above and down the pane/palette) . Can we customize this area?

Originally posted by @shruti8789 in #27 (comment)

[alexreardon]

What is the use case you are trying to support? Do you think there is something wrong with the existing logic? Could we improve it?

[alexreardon]

It feels like this issue is getting at a problem in thinking about how we auto scroll.

Here are the values we use to control auto scroll behaviour:

https://github.com/atlassian/react-beautiful-dnd/blob/master/src/state/auto-scroller/fluid-scroller/config.js

[angellindo]

@alexreardon is there a way to adjust those values to be precise the startFromPercentage

[shruti8789]

@alexreardon, If you try to drag a task outside this definite area (at the start or end of the tasks visible), as soon as you will pick the task the pane will start scrolling.
Problem: If you pick a task from below the area defined after which we start scrolling, it will automatically starts to scroll down, even if the intention of the user was to drag it upwards.

[angellindo]

@shruti8789 that is correct and that is what I'm trying to avoid or reduce.

[alexreardon]

Perhaps we could expose a way to expose the auto scroll config