Find files: Get rid of zebra striping
Problem to solve
In https://gitlab.com/gitlab-org/gitlab-ce/issues/50264#note_94796768 @jkarthik brought up the good point that the alternating background color in the table rows of our Find file view is unnecessary.
Typically you would use this pattern on data-heavy complex tables to improve readability. Here, we are only showing file names.
Proposal
Let's remove the background colors, borders are sufficient. Similar to our repository view.