UI Nits: Declutter ride plot

Too much going on and gets noisy, especially in stack mode.

Might extend this to the other plots, but need to live with
it for a while to see if the ticks were actually useful (!)
UI Nits: Less is more

Further removal of chart decorations ala the recent
changes to the ride plot, now applied to the other
charts.
UI Nits: Thinner reference line

2px too thick for a guide, made 1px which is in
line with the rest of the code.