Add global systemd config and user defined. N.B. user defined systemd units are WIP.
Drop some mistakenly added pacnew left over files.
Add X11 tweak for mouse scroll wheel emulation.
Make improvements to bash aliases relating to pacman usage.
Move around sysctl.conf to make modifications clear.
Fix typo in kernel modules-load.d alsa file.
Drop broken systemd soft link for unused laptop-mode-tools package.
Add efistub-update.path systemd service to keep EFISTUBS in sync on update.