Updating icons. (#1076)

Adding support for icon aliases
Updated resource generator to handle different versions of TLS
Updated demo app to only show distinct enum values.

Author: Keboo

MainDemo.Wpf/IconPackViewModel.cs

@@ -24,7 +24,9 @@ public IconPackViewModel(ISnackbarMessageQueue snackbarMessageQueue)
             SearchCommand = new AnotherCommandImplementation(Search);
             CopyToClipboardCommand = new AnotherCommandImplementation(CopyToClipboard);
             _packIconKinds = new Lazy<IEnumerable<PackIconKind>>(() =>
-                Enum.GetValues(typeof (PackIconKind)).OfType<PackIconKind>()
+                Enum.GetValues(typeof (PackIconKind))
+                    .OfType<PackIconKind>()
+                    .Distinct()
                     .OrderBy(k => k.ToString(), StringComparer.InvariantCultureIgnoreCase).ToList()
                 );
         }