Revert "Merge branch 'refaktoring-importu'"

This reverts commit f4e8b28498bdbd8c98fdc23761208a00663790da, reversing
changes made to 264ba5b744ccdf334522deee68093b14c5758d3e.

Ukazalo sa, ze tieto zmeny neboli dost stabilne a potrebujeme priebezne
importovat nove zmeny rozvrhu do Candle. Ked to bude poriadne otestovane,
mozme to znova skusit.