In-plot tooltips

[NateLanza]

Does this PR close any open issues?

Closes #430

Give a longer description of what this PR addresses and why it's needed

• Adds a tooltip on deviation bars giving the numerical deviation value
• Adds a tooltip on attribute plots giving Q1, Mean, Median, and Q3

Provide pictures/videos of the behavior before and after these changes (optional)

Before: No tooltips
After:

Have you added or updated relevant tests?

• Yes
• No changes are needed

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[JakeWags]

Few things stylistically:

The matrix tooltip should be styled the same. I know that those already existed, but I think it's worthwhile to update the existing ones to match the blue style. I think they currently use title, so it shouldn't be bad to just use the tooltip component.

It looks like the vertical margin from the mouse is increased when hovering over the vega plots, and lesser when hovering over the dot plots (less than 6 items in row). I can't easily capture a screenshot of these, but if you need a screen recording of this specific thing let me know.

[JakeWags]

See comments. Code itself is fine :)