Support for Group Header Slot in ui_template

[stephanlinke87]

Description

It would be cool if we could utilize the group-by feature in the template node when creating a data table via template, which is described at https://vuetifyjs.com/en/components/data-tables/basics/#group-header-slot.

When adding the example code of this to a template, the rows are non-expandable:

Within the console, the following error is shown:

So I understand that it might be a module that needs updating? Thanks in advance, and sorry if any details are missing :)

Have you provided an initial effort estimate for this issue?

I am no FlowFuse team member

[joepavitt]

This was introduced in Vuetify 3.4.0 and we are running 3.6.0, so should already support this.

[stephanlinke87]

I also tried to get the plain vanilla code to run with the template, to no avail, in a different nodered instance :( maybe somebody more versed with it could try this? :)