[Timeline] Tooltip not disappearing on mobile & scrolling.

[lewisjb]

I have come across two scenarios where the tooltip won't disappear (as mouseout isn't triggered).

1. On mobile
2. If you are hovering over an item and scroll

The easiest fix I can think of is to store the current open tooltip in ItemSet, as there logically can only be one open, that way we can force the old one to be hidden before displaying a new one.

[mojoaxel]

I can confirm that tooltips stay visible at the current position if the user scrolls, moves or zooms the timeline.

[yotamberk]

@lewisjb Can you please take care of this issue? It should be quite straight forward

[lewisjb]

Would it be more beneficial to only have one tool-tip DOM object, and instead of creating new ones when needed then hiding/showing them, just change it's value etc? Because currently if you have a lot of data in your timeline you can end up with a lot of tooltips in the DOM.

[yotamberk]

@lewisjb yes! I think only one tooltip should be available at all times

[mojoaxel]

see #2662

[mojoaxel]

fixed by @lewisjb with #2662