Presently the import process does minimal sanity checking to ensure something of value can be imported by looking for core table or a supported class.spec table.

• Enhance this to strip out anything unsupported, e.g. other specs or garbage entries (just in case a bad faith actor is sharing strings).
• Only force a UI reload if the core table or the current class you're playing is being imported.
• Give a secondary popup at least stating what specs (+core) will be imported and let them confirm.