Fixes update of Export / Export Project... menu item in CE (#3275)

* Fixes issue #3274; restores "Export Module" menu item functionality in the *Code Explorer* context menu.

Author: shadowofsilicon

RetailCoder.VBE/Navigation/CodeExplorer/CodeExplorerViewModel.cs

@@ -102,7 +102,8 @@ public CodeExplorerItemViewModel SelectedItem
                 OnPropertyChanged("CanExecuteIndenterCommand");
                 OnPropertyChanged("CanExecuteRenameCommand");
                 OnPropertyChanged("CanExecuteFindAllReferencesCommand");
-                OnPropertyChanged("CanExecuteExportAllCommand");
+                OnPropertyChanged("ExportVisibility");
+                OnPropertyChanged("ExportAllVisibility");
                 OnPropertyChanged("PanelTitle");
                 OnPropertyChanged("Description");