Top Panel Visual indicator for sms and messages

On Mobile OSes, inbound messaging can:

play a sound
have a top-panel message indicator

Shown here in the far upper left corner:

This should appear on Librem 5 top-panel as well.

dpkg -s chatty
Package: chatty
Status: install ok installed
Priority: optional
Section: net
Installed-Size: 343
Maintainer: Andrea Schäfer <andrea.schaefer@puri.sm>
Architecture: arm64
Version: 0.0.8~313.gbp3faad9
Depends: dconf-gsettings-backend | gsettings-backend, libc6 (>= 2.17), libcairo2 (>= 1.2.4), libgdk-pixbu
f2.0-0 (>= 2.22.0), libglib2.0-0 (>= 2.37.3), libgtk-3-0 (>= 3.21.5), libhandy-0.0-0 (>= 0.0.7), libpurpl
e0 (>= 2.8.0)
Suggests: calls
Description: XMPP and SMS messaging
 Chatty is a chat application for XMPP and SMS using
 libpurple and Modemmanager.
Homepage: https://source.puri.sm/Librem5/chatty

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