Slow vertical scroll on OSX

[teodorov]

The vertical scroll lacks fluidity on OSX 10.11.6, while the horizontal scroll works as expected.
I have this problem with the demos, with juliar, and with my apps that integrate RichTextFx
See attached image for an illustration of the problem

[ITrun90]

I can confirm the problem. It also seems to depend on the height of the editor whether the scrolling works well or not.

[JordanMartinez]

Could you please open up an issue in Flowless, as that's what's causing the bug?

[JordanMartinez]

This may be related to #265

[teodorov]

I think this issue is indeed related to #265.
And the solution proposed by @StrangeNoises (#265#issuecomment-262994643) seem to work.
However someone more knowledgeable than me should look at case of the reusable cells.

[JordanMartinez]

This bug may be fixed (or at least lessened) if one uses the most recent Flowless release: 0.6.1. I'm hesitant about upgrading RichTextFX's code to that so soon after the 0.9.0 release because it should also include additional public API (getFirst/LastVisibleParagraphIndex) as a faster variant of visibleParToAllParIndex(1 / getVisibleParagraphs().size() -1)

[ghost]

@Jugen this is probably related to #935 .