tooltips stick around after leaving the graph

[scottdickerson]

I am submitting a...

• Feature request
• Design defect
• Source code defect
• Demo/documentation defect
• Other

charts version:

0.41.1

Issue description

If you have two graphs right next to each other and mouse between them, somehow the event to close the tooltip gets lost and the tooltip stays showing.

It might also be nice to have a little more of a hover delay before showing the tooltip (from our testers)

Steps to produce the issue

See the recording attached here:

tooltips-dont-goaway.mov.zip

Current behavior

Expected behavior

Screenshot or recording