Update Strikethrough for Unselected Routes

[smsmsmmm]

Strikethrough text on certain lines is difficult to see when unselecting that line, especially lines H and F.

Consider some other way to indicate line is unselected.

[djmeier-wisc]

This is the default behavior of our graphing library (chart.js). I'd support updating the Ui to be more clear, especially considering there are two ways to deselect routes.

One is on the top right hand side (next to units), the other is above the graph as pictured. I'll look more into adding documentation with MUI tooltips to the route selection element, and the legend