Suggestion: display rate: add belt options

[L0laapk3]

Currently the allowed display rates are: items/second items/minute items/hour I propose the following extra options: Blue belts Red belts Yellow belts

[KirkMcDonald]

Doesn't it already display the belt counts on the factory tab? Or are you thinking of rate displays in some other place?

If you want belt counts in the visualization, that is an idea I've been kicking around for a while, and I plan on including it the next time I make a pass over that part of the code.

If you want belt counts as an input when specifying a build target, that is already issue #56.

[L0laapk3]

Yep, visualisation tab is what led me to post it here