Created attachment 1582755 [details]
Shows the window as popped up, before I mouse around in it.

Description of problem:
Fields in the popup are not displayed until you mouse over them (and possibly not even then, since I don't know what I'm not being shown).

Version-Release number of selected component (if applicable):
xfce4-settings-4.13.6-1.fc30.x86_64

How reproducible:
Use XFCE4, select "Display" from "Settings" menu

Steps to Reproduce:
1.
2.
3.

Actual results:


Expected results:


Additional info:

see attached screenshot