Re-add lightWithDarkActionBar enum item (fixes #340)

Added it in the same position as it was originally.

F-Droid/src/org/fdroid/fdroid/FDroidApp.java

@@ -86,6 +86,7 @@ public class FDroidApp extends Application {
     public enum Theme {
         dark,
         light,
+        lightWithDarkActionBar, // Obsolete
     }
 
     private static Theme curTheme = Theme.light;