Add notifications overview (#414)

Co-authored-by: kolaente <k@knt.li>
Reviewed-on: https://kolaente.dev/vikunja/frontend/pulls/414
Co-authored-by: konrad <konrad@kola-entertainments.de>
Co-committed-by: konrad <konrad@kola-entertainments.de>

src/helpers/parseDateOrNull.js

@@ -0,0 +1,6 @@
+export const parseDateOrNull = date => {
+	if (date && !date.startsWith('0001')) {
+		return new Date(date)
+	}
+	return null
+}