Adjust sys_notes styling according to UX team
Adjust CSS and styling of sys notes according to the definitions of the UX team. See #26796.
[TASK] Finalize skinning of Sys_Note (Web>List & Web>Page)
Brings last styles according to layout defined by the UX team.
Reviewed-by: Ernesto Baschny
Tested-by: Ernesto Baschny
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn