qt4 integration

[Harald Sitter]

Hola,

Way back when we wanted to have sni-qt and breeze-qt4 installed by
default alongside Plasma 5.x so that Qt4 applications would neatly
integrate. Do we still want this given the advanced legacy of Qt4? Or
can we tell distros to no longer include these by default and have the
user get a potentially less integrated experience (assuming they use
some Qt4 applications still)?

HS