Decouple save file path from config directory (closes #1025)

Signed-off-by: AnErrupTion <anerruption@disroot.org>

res/config.ini

@@ -348,8 +348,9 @@ path = /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
 # If null, the keybind is disabled and isn't shown
 restart_key = F2
 
-# Save the current desktop and login as defaults, and load them on startup
-save = true
+# Absolute directory for the save file
+# If null, current desktop & login won't be saved nor loaded
+save_file_dir = $CONFIG_DIRECTORY/ly
 
 # Service name (set to ly to use the provided pam config file)
 service_name = ly