* prepend newly plotted signal to show first
* highlight selected available message in navigation
* extract CanGraph render function in explorer
* toggle expanded signals in Legend, trigger edit and plot when expanding signal
* check if plottedSignal is new before plotting
* add uid to signal model
* use signal uid in SignalLegend and entry for keys and expanding
* adding sass npm script to watch scss files
* refactoring most of markup for semantic class naming, introducing scss files, light styling
* prefer flex over floats
* set min-width on body
Andrew Valish