In dynamic charts, keep all components (or even allow for predeclaring components)

[wiseman]

In dynamic charts, I think it can be less confusing if the message senders/receivers don't disappear if they haven't participated recently in message passing. This could be an option, e.g.

  .components(['customer', 'barista1', ...])

and then those components would always stay visible.

[koudelka]

yeah, that'd be cool. PR welcome ;)