turn on linear fades to prevent mixing from getting out of wack

and fucking fix those volume defaults once and for all

game/script.rpy

@@ -60,7 +60,7 @@ label before_main_menu:
     # Call initial language setup screen
     # languaged_up is set within lang_sel
     if (persistent.languaged_up is None):
-        $ preferences.set_volume('ui', config.default_sfx_volume) # stank fucking workaround to fix a bug
+        $ preferences.set_mixer("ui", config.default_sfx_volume)
         call screen lang_sel
     return