Security update for MozillaThunderbird

This update for MozillaThunderbird fixes the following issues: Mozilla Thunderbird was updated to 68.3esr (MFSA 2019-38 bsc#1158328) Security issues fixed: - CVE-2019-17008: Fixed a use-after-free in worker destruction (bmo#1546331) - CVE-2019-13722: Fixed a stack corruption due to incorrect number of arguments in WebRTC code (bmo#1580156) - CVE-2019-11745: Fixed an out of bounds write in NSS when encrypting with a block cipher (bmo#1586176) - CVE-2019-17009: Fixed an issue where updater temporary files accessible to unprivileged processes (bmo#1510494) - CVE-2019-17010: Fixed a use-after-free when performing device orientation checks (bmo#1581084) - CVE-2019-17005: Fixed a buffer overflow in plain text serializer (bmo#1584170) - CVE-2019-17011: Fixed a use-after-free when retrieving a document in antitracking (bmo#1591334) - CVE-2019-17012: Fixed multiple memmory issues (bmo#1449736, bmo#1533957, bmo#1560667,bmo#1567209, bmo#1580288, bmo#1585760, bmo#1592502) Other issues addressed: - New: Message display toolbar action WebExtension API (bmo#1531597) - New: Navigation buttons are now available in content tabs (bmo#787683) - Fixed an issue where write window was not always correct (bmo#1593280) - Fixed toolbar issues (bmo#1584160) - Fixed issues with LDAP lookup when SSL was enabled (bmo#1576364) - Fixed an issue with scam link confirmation panel (bmo#1596413) - Fixed an issue with the write window where the Link Properties dialog was not showing named anchors in context menu (bmo#1593629) - Fixed issues with calendar (bmo#1588516) - Fixed issues with chat where reordering via drag-and-drop was not working on Instant messaging status dialog (bmo#1591505)