Arrow is not positioned properly when using maxWidth property

[jschmitz1]

When I use the maxWidth property to allow the tooltip to be larger than normal, the arrow always stays in the bottom center of the tooltip. Since my tooltip target is on the left of the screen, the arrow will then point onto a wrong widget.
As soon as i unset maxWidth, the arrow will point onto the correct widget again, but the tooltip will be way to small for my use case.

[ubbop42]

Hey guys i have created a pr for this. It would be great if we can get the owner of the repo to merge it in. #25.