Currently the opened game window shows a default application icon, and not a custom sphereFACE one (under Linux, haven't tested on Windows taskbar).
Priority is major prior to release
load window icons with glfw for platforms that support them, resolves #304
→ <<cset 793fdc37286e>>
separate window icon loader class, re #304
→ <<cset d9b9dd98a782>>
Removing milestone: Beta (automated comment)