Improved mailboxes to include sent mails and drafts (#1038)

app/Tests/Settings/MailboxSettingsTests.cs

@@ -42,6 +42,7 @@ public sealed class MailboxSettingsTests
         AuthMethod = MailboxAuthMethod.PASSWORD,
         Username = "someone@example.org",
         RootFolder = "INBOX/Projects",
+        IncludeSentAndDrafts = false,
         MaxAge = MailboxMaxAge.LAST_24_MONTHS,
         IndexAttachments = false,
         MaxAttachmentSizeMegabytes = 25,
@@ -128,6 +129,14 @@ public sealed class MailboxSettingsTests
         });
     }
 
+    [Test]
+    public void AMailboxStoredBeforeSentMailsAndDraftsWereChoosableIncludesThem()
+    {
+        // So the next sync of a mailbox limited to a root folder fetches what it was missing:
+        var mailbox = JsonSerializer.Deserialize<DataSourceMailbox>("""{"RootFolder": "INBOX"}""", SettingsManager.JSON_OPTIONS);
+        Assert.That(mailbox.IncludeSentAndDrafts, Is.True);
+    }
+
     [Test]
     public void ValuesThisVersionCannotReadFallBackToTheSafeSide()
     {