Log Message:
Update to 68.1.1

Changelog:
    fixed Issues with attachments in IMAP messages

    fixed Gmail accounts ignored a non-standard trash folder
    selection. Note: If non-standard trash folder was selected
    previously in the account settings, this setting will now take
    effect which may be unexpected.

    fixed Entering/pasting lists of recipients into the addressing
    widget or mailing list not working reliably, especially when
    lists contained multiple commas or semicolons

    fixed Edit mailing list not working

    fixed Various theme fixes, especially dark theme improvements
    for Calendar

    fixed Contrast between tag label and background not optimal

    fixed Account Central pane always loaded at start-up

    fixed "Config Editor" button not removed if blocked by policy

    fixed Calendar: Free/busy information in attendees dialog not
    scrolled correctly. Note: Scroll arrows still not behaving
    correctly.

    fixed Various security fixes

#CVE-2019-11755: Spoofing a message author via a crafted S/MIME
message