Re-implemented signature page to support different signatures for different actions

Wino.Core.Domain/Entities/MailAccountPreferences.cs

@@ -30,5 +30,20 @@ namespace Wino.Core.Domain.Entities
         /// Null if the account provider type doesn't support Focused inbox.
         /// </summary>
         public bool? IsFocusedInboxEnabled { get; set; }
+
+        /// <summary>
+        /// Gets or sets whether signature should be appended automatically.
+        /// </summary>
+        public bool IsSignatureEnabled { get; set; }
+
+        /// <summary>
+        /// Gets or sets signature for new messages. Null if signature is not needed.
+        /// </summary>
+        public Guid? SignatureIdForNewMessages { get; set; }
+
+        /// <summary>
+        /// Gets or sets signature for following messages. Null if signature is not needed.
+        /// </summary>
+        public Guid? SignatureIdForFollowingMessages { get; set; }
     }
 }