Added filter option has files

Wino.Core.Domain/Enums/FilterOptionType.cs

@@ -5,6 +5,7 @@
         All,
         Unread,
         Flagged,
-        Mentions
+        Mentions,
+        Files
     }
 }

Wino.Core.Domain/Translations/en_US/resources.json

@@ -121,6 +121,7 @@
     "FilteringOption_All": "All",
     "FilteringOption_Flagged": "Flagged",
     "FilteringOption_Unread": "Unread",
+    "FilteringOption_Files": "Has files",
     "Focused": "Focused",
     "FolderOperation_CreateSubFolder": "Create sub folder",
     "FolderOperation_Delete": "Delete",

Wino.Core.Domain/Translator.Designer.cs

@@ -628,6 +628,11 @@ namespace Wino.Core.Domain
 		/// </summary>
 		public static string FilteringOption_Unread => Resources.GetTranslatedString(@"FilteringOption_Unread");	
 	
+        /// <summary>
+		/// Has files
+		/// </summary>
+		public static string FilteringOption_Files => Resources.GetTranslatedString(@"FilteringOption_Files");	
+	
         /// <summary>
 		/// Focused
 		/// </summary>