Refactor icons jammy (#108)

* chore: add icons and installation

* refactor: use the new battery icons

* refactor: use audio applet icons

* chore dependency cleanup

* chore: remove icons included in cosmic-icons package

* refactor: use icons for signal strength and fix handling of new connections

* fix: improve some logic for the networking applet

* chore: add cosmic-icons to Depends

* feat: use notifications icons

* chore: set bluetooth icon depending on state

* fix: set default font and text size

* feat (network): add airplane-mode message

* feat (battery): add display icons to the battery applet

* fix (battery): logic for selecting the battery icon & use new battery icons

cosmic-applet-network/i18n/en/cosmic_applet_network.ftl

@@ -1,5 +1,7 @@
 network = Network
 airplane-mode = Airplane mode
+airplane-mode-on = Airplane Mode is on
+turn-off-airplane-mode = Turn on to enable Wi-Fi, Bluetooth and mobile broadband.
 wifi = Wi-Fi
 ipv4 = IPv4 Address
 ipv6 = IPv6 Address