System Information
Operating system: windows 10
Graphics card: gtx 1080
Blender Version
blender-2.80.0-git.e60890075b37-windows64
Broken: (example: 2.80, edbf15d3c044, master, 2018-11-28, as found on the splash screen)
Worked: (optional)
Short description of error
Xray (alt Z) doesnt work in lookdev shading
Exact steps for others to reproduce the error
Based on the default startup or an attached .blend file (as simple as possible).
Go to look dev, try going to xray mode (alt Z) and it doesnt allow you