Release: Thunderbird Beta 13.0b1

Thunderbird for Android version 13.0b1, based on K-9 Mail. Changes include:

- Added new design elements to Message List UI

- Sync logging duration is now limited to 24 hours

- Client certificate was not displayed in SMTP settings

- Outlook headers included unnecessary newlines when replying

- "Enable debug logging" did not provide verbose logging

- Scrolling in a short email could trigger left/right swipe

- Scrolling only worked in center of Welcome and New Account screens (landscape)

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        applicationId = "net.thunderbird.android"

        testApplicationId = "net.thunderbird.android.tests"

        versionCode = 27

        versionCode = 28

        versionName = "13.0"

        buildConfigField("String", "CLIENT_INFO_APP_NAME", "\"Thunderbird for Android\"")