Using the View Options option inside of an asset selection dropdown window does not work. None of the options, other than the Scale slider under Thumbnails, will make any changes and the window is immediately closed upon selection.
Regression?: Yes
This did not occur in 4.14.1-3224400+++UE4+Release-4.14
This occurs in 4.15.0-3236803+++UE4+Dev-Main
Workaround: Use the View Options option in the Content Browser
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-39887 in the post.