Dashboard should use log-scale and have a smaller aspect ratio

[the8472]

Currently on my desktop the dashboard charts look like this

Due to the exponential downwards trend each incremental change becomes more more difficult to distinguish. Changing the aspect ratio to make the Y-axis taller would help to some extent. But I think we should use a log-scale, for the same reasons as @scottmcm already argued in #192 (comment)

If it's easy to toggle the charting library between linear and log then adding some toggle for that would be fine too. Then people who know how to read log scales can choose that.

[Kobzol]

It's not much better if we just switch to a log-scale:

Maybe it would be better to normalize it vs the 1.28.0 baseline instead, as discussed here.

[the8472]

Well that seems to make the effective aspect ratio worse due to the y-axis offset wasting a lot of vertical space.

[nnethercote]

When looking at those graphs I always massively shrink the width of my browser window, which makes it more readable. Perhaps we could just restrict the graph width to achieve the same effect automatically?

[s7tya]

Due to #1816, the graphs now always have a smaller width. Therefore, it might be okay to close this issue.

[Kobzol]

Now with two charts per row it's indeed much better. I wonder how would it look like with the log scale now, could you please try it?

[s7tya]

Alright! Will try