Local printers crowd out installed printers in list

In Ubuntu 18.04, the list of printers show in the control center seems to include everything which is visible by Bonjour or some other discovery service on the local network; there is no visual distinction made between "installed" printers and available ones (this is also true of print dialogs, but that's another issue).

For networks with many shared printers (many of which seem to be the result of Apple sharing attached printers by default; see screenshot), this results in an overwhelming flood of listed printers, which, worse, is constantly shifting and jumping around as network state changes. This makes it difficult to find previously installed printers in the list.

My suggestion would be to make a distinction in the UI between installed and available printers (and perhaps also to have a listing that uses less vertical space per discovered printer).

Really,system-config-printer CUPS window which is brought up by the "Additional Printer Settings" button at the bottom is far more functional, and in fact was the *only* way that I was able to add a new printer via address alone.

Description: Ubuntu 18.04.2 LTS
Release: 18.04

gnome-control-center:
  Installed: 1:3.28.2-0ubuntu0.18.04.4
  Candidate: 1:3.28.2-0ubuntu0.18.04.4
  Version table:
 *** 1:3.28.2-0ubuntu0.18.04.4 500
        500 http://us.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     1:3.28.1-0ubuntu1 500
        500 http://us.archive.ubuntu.com/ubuntu bionic/main amd64 Packages

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: gnome-control-center 1:3.28.2-0ubuntu0.18.04.4
ProcVersionSignature: Ubuntu 4.15.0-54.58-generic 4.15.18
Uname: Linux 4.15.0-54-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.7
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Fri Jul 26 13:52:06 2019
ExecutablePath: /usr/bin/gnome-control-center
InstallationDate: Installed on 2018-12-17 (221 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
ProcEnviron:
 LC_CTYPE=en_US.UTF-8
 PATH=(custom, user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-control-center
UpgradeStatus: No upgrade log present (probably fresh install)