Re-add label mug help tip and fix label text.
Re-add label mug help tip and fix label text.

Got lost during major refactoring (4c391f92).

johnhbenetech/Vellum,mwhite/Vellum,johnhbenetech/Vellum,johnhbenetech/Vellum,johnhbenetech/Vellum,mwhite/Vellum