Split the "Session" column in the Maintenance Session tab

Currently, when viewing the sessions list, it is not possible to search only for onboarding sessions.
You can filter “Triggered By” to the blank entry, but that includes schedules and automatic onboards.
What I really want to see is this column split into two, one for Session ID, and one for Session Type

Something like this:

Session ID Session Type
#12344 ad-hoc onboarding
#12345 auto-onboarding
#12346 ad-hoc maintenance
#12347 scheduled maintenance