Make {USER.NAME} & {USER.SURNAME} useable in Trigger-based notifications and commands

Our current Zabbix <-> Ticket integration requires being able to address the receiving person by his/her full name. Zabbix knows the names of each user, but can't access that information during a Trigger-based notification. The macros for that operation exist, but are not usable in that context.

Please make it possible, to resolve the macros for Trigger-based notifications and commands.