Make Ctrl-click work as right-click

Many pointing devices (mice/trackpads) only have one button. Hence we need to make Ctrl+click work as right-click throughout the system.

Enable ctrl-click as right-click

https://superuser.com/questions/336674/emulating-mouse-click-with-a-keyboard

Script:
https://github.com/NapoleonWils0n/cerberus/blob/master/openbsd/openbsd-remap-ctrl-to-right-click.sh

```
xmodmap -e "keycode 37 = Pointer_Button3"
```

alone does not seem to do the trick. __How to do this properly?__