R1:81dd92fcdc6e

Display Show Raw File link in Diffusion Change View

Summary: NOTE: `renderViewOptionsDropdown()` adds unnecessary parameters to URL but the link just redirects anyway.

Test Plan:
Show Raw File (Left and Right) in SVN and Git.
Verify also Added and Deleted files.

Reviewers: epriestley, aran

Reviewed By: epriestley

CC: Koolvin

Differential Revision: https://secure.phabricator.com/D2370