sysinfo.txt

Your system information

• Steam client version: 1471977975
• Distribution (e.g. Ubuntu): Arch Linux x86_64, with kernel 4.4.19-lts
• Opted into Steam client beta?: No
• Have you checked for system updates?: Yes

Please describe your issue in as much detail as possible:

Cannot move nor resize the Steam window when using Window Maker as a X window manager.

Steps for reproducing this issue:

1. Set wmaker as a window manager
2. Open Steam
3. Try to move it