R1:af5b94b23473

Lift most "InlineController" querying to the base class

Summary: Ref T13513. Move querying to "DiffInlineCommentQuery" classes and lift them into the base Controller.

Test Plan: In Differential and Diffusion, created, edited, and submitted inline comments.

Maniphest Tasks: T13513

Differential Revision: https://secure.phabricator.com/D21231