scrollTo / scrollToIfNecessary not working for new row at bottom of grid (off screen)

[RobPierce]

scrollToIfNecessary no longer works if the grid only extends a few lines below the visible section of the grid - this is causing the percentage calculation for the scrollEvent to be > 1 and a recent code change #6241 put in a check so that if the percentage > 1 then the scrollEvent is not setup. I'm not sure what this change was fixing but it has broken this scenario. If I knew the reason for the original change I would fork and try to fix it but I don't want to mess with it and then break something else that was fixed originally.

Here is a plunker to replicate the issue:

http://plnkr.co/edit/F3aMCzRQmBwSDip2cZ2Z?p=preview

[RobPierce]

@rdkleine if you could let me know the original issue that this change was fixing then I'd be happy to have a look at implementing a fix for this that doesn't undo the fix you made?

[RobPierce]

@mportuga do you know what the code change #6241 was put in to fix as it has caused this issue but I don't want to work on fixing it without knowing why the change was made in the first place?

[rdkleine]

I have moved on from the project where the grid was needed some time ago.

Ok I'll try to explain from memory:

1. The bottom row is in edit mode.
2. Cell navigation is enabled.
3. Cell receives focus. BUT the cell is not 100% visible.
4. You start typing. The edit action is cancelled because the grid scrolls the full cell into view.
5. You are still typing but the first character is gone because what happened in 4.

You can reproduce in tutorial 301
Focus on bottom visible cell type "hello". "h" keypress will activate scroll. "ello" will be the end result.