- add to admin ui - move to `ExtensionsSettings` - hide left navbar when disabled - do not register extension routes on startup - do not check for installed extensions on startup - reafctor into register_all_ext_routes
- add to admin ui - move to `ExtensionsSettings` - hide left navbar when disabled - do not register extension routes on startup - do not check for installed extensions on startup - reafctor into register_all_ext_routes