Resolved 2 of the TODO points

[davideas]

Hello @AndroidDeveloperLB, currently (as you know) I'm using your base FastScroller in my FlexibleAdapter library.
I don't know if I will continue to keep your base FastScroller or to change to another one, however, it now works when changing LayoutManager (switching from Linear to Grid and viceversa) and also with GridLayoutManager (probably it always worked with Grid).

In my version you will find more features: I had to customize it and improve it in order to fit in combination the adapter animations and beyond. Details are in my code.

Maybe if we work together we can add some nice features like the library I have found (see my issue).

[AndroidDeveloperLB]

I have actually never tried. Please do a pull request if you can. I wish to make this library as minimal as possible, yet work well.