Make diff view include all files by default

[jensenr30]

When I click on a commit in the CommitList, "Committed Files" will only ever have one item selected by default. In this example, it happens to be the src directory:

Wouldn't it be nice if all files were selected by default? That way, the user would see all changes in the diff view without doing any extra work:

However, having all files selected adds visual clutter. And it's possible to select no files. And if no files are selected, wouldn't it make sense to treat that the same as having all files selected?

Therefore, my proposal is to make the following behavior default:

• when the user selects a commit in the CommitList, Committed Files will update to have no files selected.
• when no files are selected in Committed Files, that is treated the same as having all files selected.

Thoughts?

If this sounds good, feel free to assign to me.

[jensenr30]

duplicate of #7