support undo/redo for azerty keyboards (#630)

* support undo/redo for azerty keyboards

* migrate to event.key

* remove unnecessary shiftKey check

Co-authored-by: David Luzar <luzar.david@gmail.com>

src/actions/actionSelectAll.ts

@@ -9,5 +9,5 @@ export const actionSelectAll: Action = {
     };
   },
   contextItemLabel: "labels.selectAll",
-  keyTest: event => event[KEYS.META] && event.code === "KeyA",
+  keyTest: event => event[KEYS.META] && event.key === "a",
 };