Gray buttons have white text

REGRESSION: Yes
WORKING 3074157
BROKEN: 3074196

In the editor, gray buttons have white text, making them hard to read.

This was seen in the Pick Parent Class and Pick Target Skeleton windows. May be effecting other buttons all over the editor.

1. Open QAGame in editor.
2. Right-click in the Content Browser, and select Blueprint Class.

RESULT:

The gray buttons on the Pick Parent Class window have white text.