Namerequest UI: update BC to BEN message

[severinbeauvais]

• Currently, in Dev, this is what you see when you try alter a BC company into a BEN:

• I think that, instead, the Alter Now button should be displayed (as for BC to CC or BC to ULC), ie:

• Also need to update ULC -> BEN.

[severinbeauvais]

@Mihai-QuickSilverDev Should the message display, or the Alter Now button display, when we go to Prod with this?

cc: @OlgaPotiagalova