when we trigger the first load before the panel was fully created,
there was no load mask for it (but the snapshots would "pop in" on load)
move the first reload into the 'activate' listener. this will be called
the every time a user opens the content tab of a datastore, so guard
it by a 'firstLoad' bool.
Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
747446eb50