One can create a Filter based on an entry's type e.g. normal, alias, shortcut, 'alias base' and 'shortcut base'.
For a filter limiting the entries to one of these types (e.g. 'Entry type' 'is' 'alias'), this works for types: normal, alias and 'alias base'.
For type 'shortcut base', the filter shows both shortcuts and their base entries.
For type 'shortcut', the filter doesn't show any entries.