setting scrollable on the parent tab panel makes not much sense and
will always add a scroll bar that can scroll a few pixels, even if
there's enough space.
Rather set it to true (= auto) in the actual panels that hold the
content.
Also set a bottom margin so that users can see the "end" of the panel
at the bottom, otherwise it looked like it had a start and sides, but
no bottom.
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
fbfc439372