Beta-1.0.4-b3

What's Changed

• fix(Draft): Single message thread only by @Ambrdctr in #925
• fix(folder): sort case insensitive, matches Web and Android by @adrien-coye in #923
• refactor: Rename UndoRedoAction to UndoAction by @PhilippeWeidmann in #927
• fix(Settings): Update traductions by @Ambrdctr in #930
• fix: Present UIActivityViewController using SwiftUI by @PhilippeWeidmann in #929
• fix: Sort mailbox correctly by @Ambrdctr in #932
• fix(ExternalContent): Update traductions by @Ambrdctr in #934
• Handling invalid signature, use default one. by @adrien-coye in #931

Full Changelog: Beta-1.0.4-b2...Beta-1.0.4-b3