change time of startupdate

change time of startupdate

because these components are not always children of
a tabpanel or standalone, we cannot use activate here
else we do not trigger the startupdate

disadvantage: when used as a child of a tabpanel,
it starts immediately instead of when clicking on the tab

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>