Add GTK_CLASS_FIX for StartupWMClass fix on Wayland

Author: fiftydinar

make-appimage.sh

@@ -16,7 +16,8 @@ export DEPLOY_GTK=1
 export GTK_DIR=gtk-4.0
 export ANYLINUX_LIB=1
 export DEPLOY_LOCALE=1
-export STARTUPWMCLASS=gearlever # For Wayland, this is 'it.mijorus.gearlever', so this needs to be changed in desktop file manually by the user in that case until some potential automatic fix exists for this
+export STARTUPWMCLASS=gearlever
+export GTK_CLASS_FIX=1
 
 # Deploy dependencies
 quick-sharun /usr/bin/gearlever \