R1:d24739ee3cfa

Minor consistency/order updates for menu items which reference other objects

Summary:
See T11957#208140.

- Let Applications have a custom name, like other object items (for example, so you can call Maniphest "Tasks" if you prefer).
- Put the optional name field after the required typeahead field for these items.
- (I left "Link" in "Name, URI" order since both are required, but there's maybe an argument for swapping them?)

Test Plan:
- Created each type of item, saw "thing, name" order.