Admin UI: Add policies (#6968)

* add policies to UI, accessing filer directly

* view, edit policies

* add back buttons for "users" page

* remove unused

* fix ui dark mode when modal is closed

* bucket view details button

* fix browser buttons

* filer action button works

* clean up masters page

* fix volume servers action buttons

* fix collections page action button

* fix properties page

* more obvious

* fix directory creation file mode

* Update file_browser_handlers.go

* directory permission

weed/admin/dash/admin_server.go

@@ -94,6 +94,7 @@ func NewAdminServer(masterAddress string, templateFS http.FileSystem, dataDir st
 							glog.V(1).Infof("Set filer client for credential manager: %s", filerAddr)
 							break
 						}
+						glog.V(1).Infof("Waiting for filer discovery for credential manager...")
 						time.Sleep(5 * time.Second) // Retry every 5 seconds
 					}
 				}()