refactor!: maintain "domain"

See toolshed/organising#636

cli/app/volume.go

@@ -14,7 +14,7 @@ import (
 )
 
 var AppVolumeListCommand = &cobra.Command{
-	Use:     "list <app> [flags]",
+	Use:     "list <domain> [flags]",
 	Aliases: []string{"ls"},
 	Short:   "List volumes associated with an app",
 	Args:    cobra.ExactArgs(1),
@@ -71,12 +71,12 @@ var AppVolumeListCommand = &cobra.Command{
 }
 
 var AppVolumeRemoveCommand = &cobra.Command{
-	Use:   "remove <app> [flags]",
+	Use:   "remove <domain> [flags]",
 	Short: "Remove volume(s) associated with an app",
 	Long: `Remove volumes associated with an app.
 
 The app in question must be undeployed before you try to remove volumes. See
-"abra app undeploy <app>" for more.
+"abra app undeploy <domain>" for more.
 
 The command is interactive and will show a multiple select input which allows
 you to make a seclection. Use the "?" key to see more help on navigating this