feat(deploy): Simplifies deploy overview (#508)

This simplifies the deploy overview, to only show 3 version fields:
- CURRENT DEPLOYMENT
- CURRENT ENV
- NEW DEPLOYMENT

It also fixes a few errors around version detection

Reviewed-on: toolshed/abra#508
Co-authored-by: p4u1 <p4u1_f4u1@riseup.net>
Co-committed-by: p4u1 <p4u1_f4u1@riseup.net>

cli/app/rollback.go

@@ -183,20 +183,13 @@ beforehand. See "abra app backup" for more.`,
 		}
 		appPkg.SetUpdateLabel(compose, stackName, app.Env)
 
-		chaosVersion := config.CHAOS_DEFAULT
-		if deployMeta.IsChaos {
-			chaosVersion = deployMeta.ChaosVersion
-		}
-
 		// NOTE(d1): no release notes implemeneted for rolling back
-		if err := internal.NewVersionOverview(
+		if err := internal.DeployOverview(
 			app,
-			downgradeWarnMessages,
-			"rollback",
 			deployMeta.Version,
-			chaosVersion,
 			chosenDowngrade,
 			"",
+			downgradeWarnMessages,
 		); err != nil {
 			log.Fatal(err)
 		}