Use Toplevel::isClient() to resolve AbstractClient type.
Prepares #81 (closed)
Note besides AbstractClient Toplevel
is inherited by Deleted
and Unmanaged
.
(Those use the same qobject_cast method to determine their type.)
For Toplevel::isDelete()
we can replace that too (only a few places).
Since there is no Toplevel::isUnmanaged()
I guess it is implied if none of AbstractClient or Deleted applies, correct?