Merge branch 'hide_threads' into 'master'

Add option --hide-threads (-T) to hide threads from display

On desktop systems, there will usually be a gazillion of threads
(hello chrome!) that clutter the display. Add an option to optionally
hide these from showing up at all.

PS: Fwiw, I'd personally prefer to have threads hidden by default. If that's desired, I can update the patch to reverse the logic.

Cheers,
Christoph

See merge request !3