Wrong datetime display under cs-CZ locale

[Scalix]

When using lang="cs-CZ", the datetime with seconds is not displayed properly.
It displays "17. 05. 2019 80:51:2" instead of "17. 05. 2019 08:05:12".

There is a difference in the cs-CZ locale, see

      console.log(new Date().toLocaleTimeString('cs-CZ')) // 8:05:12
      console.log(new Date().toLocaleTimeString('en-GB')) // 08:05:12

[Tobias Mesquita]

fixed on 1.0.0-alpha.33