ui: fix Guest Summary Notes height

ui: fix Guest Summary Notes height

fixes 'infinite' height of the guest notes, by setting the height on the
container a level up

the notes view itself is already scrollable, so if it is too large,
there'll be a scrollbar

this does not change anything for templates, as there we show nothing
under the notes and thus there the infinite height is ok

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
(cherry picked from commit 8530bc4149ee09f149c584870e0c4df5e6066a70)
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>