Release version 2.1.0

Version 2.1.0

• Thunderbird 91 Compatible
• All types of accounts are now treated equally in TB91 and later
• Sort folders by name in descending order added
• Sort folders tab initially selects the first account in the list instead of the last
• GroupBox and Caption in UI are now displayed properly
• Improved German locale (thanks to Hartmut Goebel)
• Improved Japanese locale
• Removed description about "GMail" and "Unicode" from UI
• Prevented MSF from opening multiple windows
• Changed the refresh method of Thunderbird window
• Updated WindowListener to the latest version
• Added Itagaki Fumihiko as an author
• Updated version number to 2.1.0

Release version 2.0.6

Version 2.0.6

• Support for Thunderbird version 86 and 87
• Fixed: Refresh pane at startup
• Fixed: Account list not showing in some cases
• Fixed: Startup failing in some cases

Thanks to @blono for the patch!