push initialPages before Component.onCompleted
push initialPages before Component.onCompleted

pushing initialPages on Component.onCompleted
is too late, if we do something else in
ApplicationWindow's Component.onCompleted the
order of execution will not be what we would think
it is. putting this in a signal handler fixes it,
pushes the initial pages way earlier in the startup

bearsh/kirigami,bearsh/kirigami