feature: Snap scatterplot hover to currently selected track

[ShrimpCryptid]

Problem

Closes #493, "difficult to hover + click points in a track in the scatterplot"! You can now hover on the currently selected track, and click off of it to deselect it.

New changes have been shown to and approved by scientists (Chantelle).

Estimated review size: small, 10 minutes

Solution

• Hover tooltips are now disabled for all points except the track when a track is selected.
• Clicking off of the track in an empty area of the canvas deselects the track.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

Steps to Verify:

1. Open the preview link: https://allen-cell-animated.github.io/timelapse-colorizer/pr-preview/pr-494/
2. Switch to the scatter plot and click on a point.
3. Try clicking any points along the track.
4. Deselect the track by clicking off of it.
   (Compare with the public build at https://timelapse.allencell.org)

Screenshots (optional):

[github-actions]

PR Preview Action v1.4.8
Preview removed because the pull request was closed.
2025-01-09 17:55 UTC

[github-actions]

Coverage Report

Status	Category	Percentage	Covered / Total
🔵	Lines	75.08%	5260 / 7005
🔵	Statements	75.08%	5260 / 7005
🔵	Functions	57.62%	136 / 236
🔵	Branches	80.81%	438 / 542

File Coverage

File	Stmts	% Branch	% Funcs	% Lines	Uncovered Lines
Changed Files
src/components/Tabs/scatter_plot_data_utils.ts	58.49%	100%	27.27%	58.49%	64-72, 106-107, 113-122, 126-133, 137-144, 151-156, 160-179, 188-212

Generated in workflow #1272

[ascibisz]

Even as a novice user, this is a much better user experience! Seems like an adventure fighting working with plotly to get this ready 😆, I appreciate all the comments. LGTM!