Root contact concept.

Wino.Core.Domain/Entities/AccountContact.cs

@@ -17,6 +17,7 @@ namespace Wino.Core.Domain.Entities
         public string Address { get; set; }
         public string Name { get; set; }
         public string Base64ContactPicture { get; set; }
+        public bool IsRootContact { get; set; }
 
         public string DisplayName => Address == Name ? Address : $"{Name} <{Address}>";
 

Wino.Core/Services/AccountService.cs

@@ -338,7 +338,8 @@ namespace Wino.Core.Services
                 {
                     Address = account.Address,
                     Name = account.SenderName,
-                    Base64ContactPicture = account.Base64ProfilePictureData
+                    Base64ContactPicture = account.Base64ProfilePictureData,
+                    IsRootContact = true
                 };
 
                 await Connection.InsertOrReplaceAsync(accountContact).ConfigureAwait(false);

Wino.Core/Services/ContactService.cs

@@ -52,7 +52,10 @@ namespace Wino.Core.Services
                 {
                     await Connection.InsertAsync(info).ConfigureAwait(false);
                 }
-                await Connection.InsertOrReplaceAsync(info).ConfigureAwait(false);
+                else if (!currentContact.IsRootContact) // Don't update root contacts. They belong to accounts.
+                {
+                    await Connection.InsertOrReplaceAsync(info).ConfigureAwait(false);
+                }
             }
         }
     }

Wino.Core/Services/MailService.cs

@@ -305,7 +305,7 @@ namespace Wino.Core.Services
 
                     mailCopy.AssignedFolder = folderAssignment;
                     mailCopy.AssignedAccount = accountAssignment;
-                    mailCopy.SenderContact = contactAssignment;
+                    mailCopy.SenderContact = contactAssignment ?? new AccountContact() { Name = mailCopy.FromName, Address = mailCopy.FromAddress };
                 }
             }
         }