Make-so multi-premise arguments show a child-limit-bar if it has more than two (or maybe three; for sl, 0) premises (eg. needed for massive multi-premise-arg in diablo map)

[Venryx]

Also:

• Map settings should let you set the "premises shown by default". (or just have it be part of sl-layout-mode to be set to 0, instead of dm-default)
• Expand/contract buttons have space, so should say "Expand X premises". (if in SL map, probably show "Expand X components" instead)