We didn't have a "destructive-action" class anymore and the
"suggested-action" was hidden by further CSS rule, so it needed to be
moved down so that it gets precedence.
We used to have these as red and green buttons originally (e.g. pasting
as floating selection, the "New Layer" and "Anchor" were the suggested
actions, i.e. green, whereas "Delete Layer" was destructive, red). For
GIMP 3.0, we keep grayscale design. We'll see if this will change later,
but at least, now we have something again.
e06cf3aee0