Selecting a commit should lead to a files view which then leads to the diffs view

[manishapb]

On the status page, we can go to the unstaged/staged files views, where we can see a list of files.
We then go to the individual files and see the diffs inside them.

In the Commit Logs page, though, if we select a commit, we see a list of diffs from all files changed in that commit. We should see a list of changed files instead, and selecting one of those files should show the diffs for that file.