General graphing updates: Median, normalization, rounding, tooltips, toolbar

[Ivorforce]

Here's the changes:

• Update ApexCharts (I noticed that it was quite unreliable with tick values; it's a bit better in the new version)
• Always use relative values to display benchmarks. Actual values are platform dependent and therefore meaningless to a reader, without knowing how the benchmark was implemented and where it runs. What's important is seeing at a glance which benchmarks are improving and which are regressing. Therefore, a reference of 1.0 is appropriate for every benchmark.
• Use the median of the last 10 values as reference, such that new benchmarks are always on the graph. Using the average of all values can look nicer, but it can make the graph useless for day to day improvements. The important values are the very newest ones. The median should be used instead of mean because it's more robust against outliers.
• Don't round values in the data aggregator, round them on visualization instead. This should be obvious why it's important, otherwise we'll get artifacts in the graph.
• Toolbar, zoom especially, is enabled in detail view.
• Tooltips are no longer shared, such that singular lines can be dissected by hovering.
• I tried to add logarithmic scales, but apex charts appears to be very buggy with them. Scrapped for the moment.

Some comparisons

Before:

After: (the colors should still appear the same, my dataset just seems to be slightly different)

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After:

Before:

After: