PUBDEV-1821 Change icon on import model button.
PUBDEV-1821 Change icon on import model button.

printedheart/h2o-flow,junwucs/h2o-flow,h2oai/h2o-flow,junwucs/h2o-flow,h2oai/h2o-flow,printedheart/h2o-flow,printedheart/h2o-flow,junwucs/h2o-flow