Managed Deployments (and BuildConfigs) should show a warning when changed via form or yaml

When a managed service creates a Deployment (or BuildConfig, or another resource where the console shows a custom edit form) this form currently doesn't show any warning when the users edits this.

When the user opens the detail page instead and opens the "YAML" tab and press save, the user gets an warning that this resource is a managed resource and her/his changes might get lost.