Add sorting of keys while printing objects

[maximvl]

Add nice sorted formatting of objects

[Joshfindit]

See "What you see in JSON Formatter is a representation of the parsed object/array. You see what V8 sees."

[maximvl]

@Joshfindit I saw it, however it is not true:

That would require manually parsing the JSON string with regular expressions (instead of using JSON.parse), which would be too slow

That requires only sorting on formatting step, no additional extra parsing or anything else. Check commit code.

[fenollp]

This was the case before: #46
Maybe we could make this an option? I'd love it!

In the meantime this other extension has the sortKeys option: https://chrome.google.com/webstore/detail/json-viewer/gbmdgpbipfallnflgajpaliibnhdgobh

[maximvl]

For sure this can be done as a conditional option. It's quite trivial to add.

Also the original change was reported almost 2 years ago, and is only 3 lines of code, so I don't think anybody cares :)