GNOME Bugzilla – Bug 793203
remove icon title (OSC 1) support
Last modified: 2018-03-27 17:52:25 UTC
The icon title is an obsolete concept, only used on X, as an alternative to the window title for the iconified state. The corresponding API call gdk_window_set_icon_name() is a no-op on all non-X backends; and even on X is not actually used by gnome-shell.
+1 It's also unclear how title stacking (bug 699819) should work (should it push both titles to their separate stacks, or what). Plus, I got totally confused the other day by before realizing that g[dt]k_window_set_icon_name have absolutely nothing to do with each other. Of course it's not a good argument for removing, just mentioning it for fun :)
Fixed on master.