Display workload scatterplots

[camillobruni]

Display a mini scatterplot for each subtest to help with quickly assessing noise levels.

• Keep the raw results in Benchmark.processResults
• Clean up CSS colors by using variables
• Only display 2 decimal digits for all scores (this occasionally caused line wraps for the displayed subscores)
• Use the same formatting for the total subscores as for the subtest subscores (visible only when clicking)

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[danleh]

Very cool feature! Very minor rendering glitch (Chrome M139, Linux) during loading:

Note how the second placeholder bar has a protruding edge of some sort on the lower left corner. Is there some overlapping element being rendered here?

[danleh]

LGTM with tiny nits.

[camillobruni]

Looks like the underscores <h4 class="score" id="${overallScoreId}">___</h4> where accidentally rendered at the bottom-left due to some missing CSS rules and that caused the corner to be filled out :P. Using   as placeholder now.