feat: Support decimal values in table progress cell type #824

[dbranley]

Closes #824

The PR fulfills these requirements: (check all the apply)

• It's submitted to the main branch.
• When resolving a specific issue, it's referenced in the PR's title (e.g. feat: Add a button #xxx, where "xxx" is the issue number).
• When resolving a specific issue, the PR description includes Closes #xxx, where "xxx" is the issue number.
• If changes were made to ui folder, unit tests (make test) still pass.
• New/updated tests are included

As explained in the issue, the table progress cell currently rounds values to whole numbers when diplaying them as a percentage. With this change, the percentage will now render with up to 2 decimal places. This is accomplished by using toFixed(2) and parseFloat() together to ensure data is rounded properly and then trailing zeros are removed. The code change in ui/src/progress_table_cell_type.tsx looks like this:

<div className={css.percent}>{`${Number.parseFloat((progress * 100).toFixed(2))}%`}</div>

Here is a partial screen shot of the Table example where you can see the progress data now being displayed with up to 2 decimal places:

There is a new test case in progress_table_cell_type.test.tsx. The test rerenders the XProgressTableCellType component in a loop to make sure that the component is rendering the following input decimal values correctly:

  progressValues = [
    {input: 0.88, output: '88%'},
    {input: 0.888, output: '88.8%'},
    {input: 0.8888, output: '88.88%'},
    {input: 0.88888, output: '88.89%'},
    {input: 0.88899, output: '88.9%'},
    {input: 0.88999, output: '89%'},]

I ran all the ui tests and confirmed they passed. Here is a screen shot for that:

[mturoci]

Thanks @dbranley! Just 1 change required, otherwise like it a lot :)

[mturoci]

LGTM. Great job @dbranley!

Especially appreciate your independence, quick and constructive discussion and flawless execution (+ you included tests without me explicitly asking!). Prime example of how OSS contributions should look like.