Create a virtual default audio output

Managing your audio output manually is kind of cumbersome; Chrome creates a default audio output for us, but now that audio outputs are enabled on Firefox as well, I find it necessary for a good user experience that there always be a way to set it to "whatever the default is".

locales/en-GB/app.json

@@ -48,13 +48,11 @@
     "audio": "Audio",
     "avatar": "Avatar",
     "back": "Back",
-    "camera": "Camera",
     "display_name": "Display name",
     "encrypted": "Encrypted",
     "error": "Error",
     "home": "Home",
     "loading": "Loading…",
-    "microphone": "Microphone",
     "next": "Next",
     "options": "Options",
     "password": "Password",
@@ -149,6 +147,15 @@
     "developer_settings_label": "Developer Settings",
     "developer_settings_label_description": "Expose developer settings in the settings window.",
     "developer_tab_title": "Developer",
+    "devices": {
+      "camera": "Camera",
+      "camera_numbered": "Camera {{n}}",
+      "default": "Default",
+      "microphone": "Microphone",
+      "microphone_numbered": "Microphone {{n}}",
+      "speaker": "Speaker",
+      "speaker_numbered": "Speaker {{n}}"
+    },
     "duplicate_tiles_label": "Number of additional tile copies per participant",
     "feedback_tab_body": "If you are experiencing issues or simply would like to provide some feedback, please send us a short description below.",
     "feedback_tab_description_label": "Your feedback",
@@ -168,8 +175,7 @@
     "preferences_tab_body": "Here you can configure extra options for an improved experience",
     "preferences_tab_h4": "Preferences",
     "preferences_tab_show_hand_raised_timer_description": "Show a timer when a participant raises their hand",
-    "preferences_tab_show_hand_raised_timer_label": "Show hand raise duration",
-    "speaker_device_selection_label": "Speaker"
+    "preferences_tab_show_hand_raised_timer_label": "Show hand raise duration"
   },
   "star_rating_input_label_one": "{{count}} stars",
   "star_rating_input_label_other": "{{count}} stars",