GNOME Bugzilla – Bug 793710
detach icon is empty or missing when desktop title bar buttons are positioned to the left
Last modified: 2018-04-12 01:43:41 UTC
Created attachment 368743 [details] detach button is empty In the mailing list it's been reported that if in gnome-tweak tool you set the title bar buttons to the left (instead of right), then the detach button disappears. I've just made a try on Fedora 27/GNOME and the button is present but it's empty. See attached screenshot.
I confirm this bug. I get it with Ubuntu 17.10 with the Unity window manager/UI.
Thanks for pointing this out. Fix pushed to master as commit 67e8a8ab and geary-0.12 as commit 6be70ffe.