node/APTRepositories: rework top status and error grid

node/APTRepositories: rework top status and error grid

instead of having a title bar and a seperate error grid,
add an always visible panel that displays the status (ok, warning, errors)
which also contains the error grid (if necessary, ala ceph summary)

this makes the panel more consistent to use and it is immediatly
visible if something is wrong

this also adds a test for the 'test' repositories, as well as a test
for not correctly configured suites

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