[iso-profiles] Don't ask for a password in a live session, add missing symlinks, delete 50-max_user_watches.conf

Greetings!

Got some fixes/improvements, please take a look Manjaro Team: Stop polkit-enabled programs from asking the user for a password in a live session (!180) · Merge Requests · Profiles & Settings / iso-profiles · GitLab

Text from merge request:

This is something that is very annoying. I get the question “what password do I use???” about 5 times a week. This MR simply removes the password for the “manjaro” user in a live session. This is already done for sudo, but not for polkit for some reason.

Additionally, I took the time to create the proper symlinks for NXD and some OEM stuff