fix: unmute video on audio only switch off

Will unmute local video (and ask for permissions if needed) in case user
started in audio only mode and is turing it off.

modules/API/API.js

@@ -36,7 +36,9 @@ function initCommands() {
         'display-name':
             APP.conference.changeLocalDisplayName.bind(APP.conference),
         'toggle-audio': () => APP.conference.toggleAudioMuted(true),
-        'toggle-video': () => APP.conference.toggleVideoMuted(true),
+        'toggle-video': () => {
+            APP.conference.toggleVideoMuted(false /* no UI */);
+        },
         'toggle-film-strip': APP.UI.toggleFilmstrip,
         'toggle-chat': APP.UI.toggleChat,
         'toggle-contact-list': APP.UI.toggleContactList,