[buildiso] make displaymanager settings more dynamic
Created by: udeved
The reason for this, lightdm autologin doesn't work if I provide a lightdm.conf in profile.
Problem here, I want to use the lxqt greeter, which needs greeter settings set.
the displaymanager file in profile could be expanded with a theme variable or we put it in manjaro-tools.conf. Thats a special case for non gtk greeter, as lightdm defaults to gtk greeters.
Apart from that, lightdm needs VT7 on openrc which can be easily done in code.
Is lightdm the only DM which needs such specific stuff to fix autologin issues?