fix: correct append service name logic in Filters function (!396)

This fixes a regression introduced by #395

Reviewed-on: coop-cloud/abra#396
Co-authored-by: p4u1 <p4u1_f4u1@riseup.net>
Co-committed-by: p4u1 <p4u1_f4u1@riseup.net>

pkg/config/app.go

@@ -95,7 +95,9 @@ func (a App) Filters(appendServiceNames, exactMatch bool, services ...string) (f
 		return filters, nil
 	}
 
-	if appendServiceNames {
+	// When not appending the service name, just add one filter for the whole
+	// stack.
+	if !appendServiceNames {
 		f := fmt.Sprintf("%s", a.StackName())
 		if exactMatch {
 			f = fmt.Sprintf("^%s", f)