If the pipeline is horrendously long, you must allow for horizontal scrolling. There's no reason to limit the view to the browser width if the pipeline itself is wider than the browser. I have a pipeline that is 20+ cards long, and with width: 100%, the cards were shrunk to < 10px. If the pipeline is too short, the cards shouldn't be expanding to fill the width.
A fixed width build card at least allows a reasonable minimal-width for the pipeline, even if it looks bad because it overflows the parent container. The parent container (form#pipeline I believe) should expand to the width of its contents too (or scroll).
dserodio,
Could you attach a screenshot including the window?The browser size (or screen resolution) would be helpful.What is your proposal to improve this?
The space is limited. If we use fixed box width, we will need a horizontal scroll.