Need to reset the scroll position of table widget

[wenhsinhsieh]

Is your feature request related to a problem? Please describe:

When the length of the table widget is changed, calling refresh function doesn't reset the scroll position, so if the number of row becomes less after refresh, the scroll position becomes out of bound, which doesn't look right.

Is it possible to construct a solution with the existing API?

No

Describe the solution you'd like to see:

Having a way to reset the scroll position to the top.

[andydotxyz]

Just like #2105 we should probably expose some of the scrolll functions to allow this to happen.

[andydotxyz]

This probably applies to all 3 collections:

• List
• Table (ScrollTo API on List widget #2195)
• Tree

[nealmcc]

The two pull requests combined should resolve this issue

[andydotxyz]

On develop for testing and will be in the v2.1 release