R1:053d6111e4ab

Refine inline style rendering in email

Summary: Ref T10694. Move the inline style more toward a mix of standard`<pre>` style and the web UI style for inlines.

Test Plan: See screenshots in comments.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T10694

Differential Revision: https://secure.phabricator.com/D15857