NEW ARTICLE: Cross device import of email settings feature (QR code, etc)

[rtanglao]

• SUMO KB article with the material from Document the Account migration setup flows (QR code, etc) thunderbird-android#8109
• Perhaps this article needs to be set to be applicable to both products: Thunderbird for Android and Thunderbird Desktop

Checklist

• Document import from K-9
• Document import from Thunderbird Desktop

[rtanglao]

• stub is live at: https://support.mozilla.org/kb/thunderbird-android-import ; rev 286063

[rtanglao]

• from toby in Matrix: The desktop side should now all be in review. If you want to test the full integration you can get the following desktop builds: Linux Mac OS Windows (from https://treeherder.mozilla.org/jobs?repo=try-comm-central&revision=0be438f079a31ed91ff2e4cdf41336a02ef1f4f5). These builds have everything, except that you can't search for the qr export pane in the search bar of the settings, but that should be of little concern for now (if absolutely needed I can run a new try build, but I've been holding off since we have lots of extra failing tests currently, so value is limited :( ). You can get to the new shiny UI by clicking on the app menu in the top right, then click "Settings" and you should see "Export for Mobile" as a category in the tab that opens.