R1:eab768f70552

Allow projects to be quickly added from the Maniphest task creation interface

Summary:
Provide a quick workflow for adding a new project. This ended up being sort of
complicated because we don't currently put forms in dialogs. I separated the
actual <form /> tag out of the display/layout of AphrontFormView to enable this
(the dialog is itself a form).

Limitations: if you create a new project and then remove it, it won't appear in
the tokenizer until you reload the page. We need to add the ability for the…