Fix two issues with Remarkup in Pholio
- Mock descriptions did not markup.
- Image descriptions did not get a proper container <div />.
- Created a mock with remarkup in the mock description and in an image description.
- Viewed mock detail.
- Saw list styles render properly in both mock description and image description.
Reviewed By: chad
Maniphest Tasks: T10865
Differential Revision: https://secure.phabricator.com/D15793