fix: list downgrades/upgrades in correct order

Now that we have correct sorting of versions:

  coop-cloud/organising#427

We don't need to reverse sort. Only for showing prompts when the
latest should be the first. Otherwise, logic can follow the sorted
order, the last item in the list is the latest upgrade.

Related:

  coop-cloud/organising#444

Also fix `upgrade` to actually show the latest version

cli/app/rollback.go

@@ -124,17 +124,15 @@ recipes.
 			}
 		}
 
-		availableDowngrades = internal.ReverseStringList(availableDowngrades)
-
 		var chosenDowngrade string
-		if !internal.Chaos {
+		if len(availableDowngrades) > 0 && !internal.Chaos {
 			if internal.Force || internal.NoInput {
-				chosenDowngrade = availableDowngrades[0]
+				chosenDowngrade = availableDowngrades[len(availableDowngrades)-1]
 				logrus.Debugf("choosing %s as version to downgrade to (--force)", chosenDowngrade)
 			} else {
 				prompt := &survey.Select{
 					Message: fmt.Sprintf("Please select a downgrade (current version: %s):", deployedVersion),
-					Options: availableDowngrades,
+					Options: internal.ReverseStringList(availableDowngrades),
 				}
 				if err := survey.AskOne(prompt, &chosenDowngrade); err != nil {
 					return err

cli/app/upgrade.go

@@ -127,8 +127,6 @@ recipes.
 			}
 		}
 
-		availableUpgrades = internal.ReverseStringList(availableUpgrades)
-
 		var chosenUpgrade string
 		if len(availableUpgrades) > 0 && !internal.Chaos {
 			if internal.Force || internal.NoInput {
@@ -137,7 +135,7 @@ recipes.
 			} else {
 				prompt := &survey.Select{
 					Message: fmt.Sprintf("Please select an upgrade (current version: %s):", deployedVersion),
-					Options: availableUpgrades,
+					Options: internal.ReverseStringList(availableUpgrades),
 				}
 				if err := survey.AskOne(prompt, &chosenUpgrade); err != nil {
 					return err