ChangeScreen2: Do not display 'M' next to modified files

Most files are modified. Its the added/deleted/renamed/copied files
that need to be highlighted as outside of the typical review flow.

Avoid UI clutter by only displaying 'ADRCW' status codes, or any
other codes the server returns in the REST API.

Change-Id: I332152c3d6f8c6416649e3f7efe6a3a141f28536
3 files changed