set model on initialization (#884)
set model on initialization (#884)

* set model on initialization

* Apply fixes from StyleCI

* move to View class

* remove from Grid class

Co-authored-by: Imants Horsts <ad7b3019762b62b447e5ad9e8377ecc2598f1d5c@users.noreply.github.com>

atk4/ui,atk4/ui,atk4/ui