• HostsIndex uses useForemanModal in multiple files
• index.js
• assignTaxonomy
• buildHosts
• changeOwner
• Diassociate
• reassignHostGroup

These modals currently use multiple IDs and setters. All of these usages should be replaced by React useState() in combination with modal IDs. So isOpen will check the state for its modal ID. It will simplify the code, because of less setters, but it will keep the same logic.