Dynamically trim zero padding from decimal digits in data explorer grid (or similar)

[wesm]

Aside from potentially doing some light analysis to determine the number of digits of precision to display by default when formatting data for the frontend, one thing we've discussed is removing superfluous zero-padding while maintaining decimal alignment on the in-waffle data in the data explorer. So when the user scrolls, some zero padding might be restored if there are values that have additional significant digits.

Related to #2339, #3210