fixed role (column can be deleted from user and it checks in staff as it suppose to, removed role from user constructor and db table User), fixed db error on project remove, added refresh button, fixed error when possible to add staff if no project is selected.
fixed role (column can be deleted from user and it checks in staff as it suppose to, removed role from user constructor and db table User), fixed db error on project remove, added refresh button, fixed error when possible to add staff if no project is selected.