Need small plotting fixes on report gen

Splitting this issue out from #183 to claim it while working on it.

Will address:

• magnitude plot: full log on the left, but narrowed range for residual
• phase plot: full 180 range on the left plot, but narrow/adaptive axes on the right
• Font size for axis tick labels
• Corner plot visual spacing, get rid of whitespace
• Different marker shapes for different data series

And also

• Fix percentage conversion issue

along the way, since it's tiny.