Added new sort-option: Date added.

Output/Languages/English.xml

@@ -59,6 +59,7 @@
   <string name="TR_CONFIG_YEAR">Year</string>
   <string name="TR_CONFIG_DECADE">Decade</string>
   <string name="TR_CONFIG_LANGUAGE">Language</string>
+  <string name="TR_CONFIG_DATEADDED">Date added</string>
   <string name="TR_CONFIG_EASY">Easy</string>
   <string name="TR_CONFIG_NORMAL">Normal</string>
   <string name="TR_CONFIG_HARD">Hard</string>

Vocaluxe/Base/CSongSorter.cs

@@ -181,6 +181,9 @@ namespace Vocaluxe.Base
                 case ESongSorting.TR_CONFIG_LANGUAGE:
                     fieldName = "Language";
                     break;
+                case ESongSorting.TR_CONFIG_DATEADDED:
+                    fieldName = "DateAdded";
+                    break;
                 default:
                     fieldName = "";
                     break;

VocaluxeLib/Enums.cs

@@ -199,7 +199,8 @@ namespace VocaluxeLib
         TR_CONFIG_GENRE,
         TR_CONFIG_LANGUAGE,
         TR_CONFIG_YEAR,
-        TR_CONFIG_DECADE
+        TR_CONFIG_DECADE,
+        TR_CONFIG_DATEADDED
         // ReSharper restore InconsistentNaming
     }