Add API to set/clear suggested- and destructive-action style classes
@dboles
Submitted by Daniel Boles Link to original bug (#782591)
Description
as per https://bugzilla.gnome.org/show_bug.cgi?id=779653#c32
I'm working on a patch
related: we should presumably add API for Box to set the .linked class too.
Version: 3.90.x