some fitting rules copied over from PVE's ext6-pve.css file.
simply place it in the css subfolder where the proxmox-backup-gui.js
file is hosted and add a "css/" alias for that directory, the
formatter gets use the right content type with that.
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
2d694f8f1f