Discriminated Unions should come first in pattern matching Intellisense

[Happypig375]

Is your feature request related to a problem? Please describe.
Intellisense in pattern matching isn't very useful. For instance:

Describe the solution you'd like
I'd expect DU1 to DU5 to be at the top of the list with DU1 highlighted.

Describe alternatives you've considered
Keeping the status quo. Intellisense looks bad in this case.

Additional context
Nope