Change Details

Updated mailspring to 1.2.0 which includes multiple bug fixes and the introduction of Thread Sharing. Changelog can be found [here](https://github.com/Foundry376/Mailspring/releases/tag/1.2.0).

Updated mailspring to 1.2.1 which includes multiple bug fixes and the introduction of Thread Sharing. Changelog can be found [here](https://github.com/Foundry376/Mailspring/releases/tag/1.2.1).

Updated mailspring to 1.2.01 which includes multiple bug fixes and the introduction of Thread Sharing. Changelog can be found [here](https://github.com/Foundry376/Mailspring/releases/tag/1.2.01).