Counterintuitive behaviour of "Start at login" option

If guake has been added to autostart using an external tool (e.g. gnome-tweak-tool) rather than its own new internal "start at login" option, it silently removes itself from autostart on first start - because the new option's default is set to false and the code enforces it on start up. The culprit seems to be 24fee821e471263036bbd01c88283124c322a6c0 that added the option.

This is a very counterintuitive and annoying behaviour I've ran into after recently upgrading guake, I had to waste some time to find out what was messing up with my autostart! Please respect user's freedom to manage autostart on his own and don't set/remove entries without an explicit choice from the user.