selector right now that u call up from keybindings. if u switch terms
it kicks in with some visuals too. theme stuff is currently not
done/ready at all. just recycling terminolgy bg edje atm. havent done
anything to:
1. track "window titles" per term and put into tab term previews
2. make preview look decent (some shadowing and spacing between terms
etc.)
3. track/display things like bell alerts
still need to have a way to suspend/unsuspend invisible terms so media
stuff pauses in playback etc. etc.
