Fixed commit search UI

## What does this MR do?

Fixes the UI for commits in search.

If the scope of the search is commits then it renders the list in a `ul` to match the same styling as that on the commits UI.

## Screenshots (if relevant)

![Screen_Shot_2016-09-05_at_15.30.12](/uploads/f567a224be44d5a9b015ac5d1c399bd7/Screen_Shot_2016-09-05_at_15.30.12.png)

## What are the relevant issue numbers?

Closes #21868

See merge request !6205