frontend: use ui.select instead of typeahead for new asset modal
frontend: use ui.select instead of typeahead for admin/orgs and admin/types
frontend: hide parent org select if org already has children

not yet supporting multi-level children
frontend: add ability to remove an org's parent
api: refactor organization update route
create test dir
frontend: started creating unit tests for filters; moved filters into their own filtersModule for easier testing
frontend: refactored sorting orgs by parent/name, created a filter to do it