Okay, I sort of did this by accident. But, I was trying to enable Pidgin (an instant messenger) the ability to notify using the “tray-icon,” and I did this:
- run dconf-editor
- open com -> canonical -> unity -> panel
- set systray-whitelist to “[‘all’]”
Which did this (notice tray-icons):
I’m not sure this is what I wanted, but thought I’d share.