Auto-reorder entries according to keys

[vasekbrychta]

I'd like to have an option to trigger reordering of all entries in a file by keys' names.

Basically to turn something like this

second:
    third: 'something'
    fourth: 'something else'
first: 'my name'

into that

first: 'my name'
second:
    fourth: 'something else'
    third: 'something'

It would help with keeping my translation files organized.