notes: add UI_PREFIX to port name messages; hide them with -q
notes: add UI_PREFIX to port name messages; hide them with -q

This makes 'port notes installed' much more useful since you can more
easily distinguish actual notes.

An example:

$ ./port.sh notes maven\* and installed
--->  maven3 has the following notes:
  To make maven 3.6.3 the default, please run
  	sudo port select --set maven maven3
--->  maven_select has no notes.

neverpanic/macports-base,macports/macports-base,neverpanic/macports-base,danchr/macports-base,danchr/macports-base,macports/macports-base