Parameterize the properties panel component label getter

[Skaiir]

Is your feature request related to a problem? Please describe.

We're starting to get quite a few components who's subheading don't quite match the label. While keeping the same default behaviors, I think we should introduce a config at the component label to define how the label is obtained. This is useful to keep our code base nice and clean, but also for custom components which might want to control this property.

Describe the solution you'd like

I think adding a simple getSubheading, or something of the sort, to component.config objects

Describe alternatives you've considered

n/a

Additional context

Somewhat related: #1291

[Skaiir]

Closed via #1300