Windowkill 4.0.2 update

[h2]New Features[/h2] [list] [*] Added/updated new translations for several languages [*] Added "icon" config option for custom window theme assets [list] [*] This allows for changing the small icon in the top-left of windows [/list][*] Added close text/button to ??? win screen [/list] [h2]Changes[/h2] [list] [*] ??? fight window now has a velocity cap [*] mebo no longer regenerates/converges when charging with orb bullet [/list] [h2]Fixes[/h2] [list] [*] Fixed challenge mode text not updating on language switch [*] Fixed XD skin unlock requirement progressing after death [*] Removed leftover debug code that enabled locked characters in friend window [*] Background now updates immediately when switching between choices [*] Fixed another case of broken transparency for some users [/list]