Add Supernova App Menu article

thunderbird / knowledgebase-issues

for tracking Thunderbird Desktop SUMO Knowledge Base issues

Mozilla Public License 2.0

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Open rtanglao opened 11 months ago

rtanglao commented 11 months ago

[ ] screenshot showing strip with hamburger
[ ] screenshot of hamburger menu
[ ] how to switch layouts
[ ] and common tasks like View>layout>messagelistheader (See 1418665 Hide message list header > how to unhide it ?)