Edge's tooltip is not shown if you hover too far from the edge, even if you are still on edge handle

[Djazouli]

Describe the bug
The overlay for the edge is only created over the edge path, but not the edge handle. This means that if you have a big edge handle, and you hover on a side of it, outside edge's path, the tooltip will not show.

To Reproduce
Steps to reproduce the behavior:

1. Select the base example, change the SpecialEdgeShape to:

2. Hover on the top or bottom of the edge handle. 3. The tooltip will not appear (see screenshot)

Expected behavior
I think the tooltip should appear, as it appears when you hover over the rest of the edge.

Screenshots
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Desktop (please complete the following information):
OS: macOS Catalina v10.15.5
Browser: Brave
Version 1.10.97 Chromium: 83.0.4103.116 (Official Build) (64-bit)

Additional context
Add any other context about the problem here.