21898bb831
`deactivate` is only triggered if we switch to a different tab on the same navigation level, but if we switch to a completely different component (e.g., fom `Options -> Others` to `Datastore foo`) we can only work with the destroy event, use the before one as else we cannot access the view controllers method anymore. Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>