ui: journalview: fix wrong first load with timespan

ui: journalview: fix wrong first load with timespan

calling updateParams here lead to making an api call with the default
timespan (last 3 days) on pbs/pmg when going to the 'administration'
panel, even though it would never be shown since on tab activate we would
show the 'live mode' which does not use the timespan

on pve this did not happen since the journalview is on its own page and
the change to livemode triggered too fast..

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