Allow right arrowing into activity monitor for a list of all processes

Recently it's been bugging me that there's no easy way to get a list of running apps (other than right arrowing into the 'Running Applications & Processes' catalog entry - but that requires having QS catalog entries indexed in your Catalog)

This allows → into Activity Monitor for a list.

Note: It seems `QSProcessMonitor` (actually, `NDProcess`) doesn't actually pick up every process. E.g. zsh. pbs and other low processes are ignored. Not sure how to rectify that since I think it's OS level (` GetNextProcess()`)