Some small fixes

[UnicodeError0041]

These commits should fix the following:

1) A horizontal scrolling issue 2) #5 3) #15 4) A bug where generateUniqueId({ a: 'a', b: 'b' }) !== generateUniqueId({ b: 'b', a: 'a' })

Note, that since I've changed the generateUniqueId function, lessons stored locally could have an id different from what the current implementation would give them.

[slashwarm]

Illetve pusholtam egy commitot, amivel kicsit egyszerűsítettem a mentésnél a state kezelést. Légyszi nézd meg, hogy szerinted is jó-e.