fix array elements chevron bad positioning + fix bad sizing of array elements

[Sparksx]

Hi

In my previous pull request I've fixed height of array element to 30px
But after some testing, it's causing visual bug on array of array or array of object.

Height must not be fixed to 30px but minimum height of element is 30px.
With min-height 30px array of boolean is nice and array of array or array of object is correctly sized.

My bad, I'm sorry for that.

I've already fixed position of chevron (in collision with list style type)

see the difference between your's and mine

tested with
{ "test": [ { "field": "value", "test": [ { "boolean": [ false, true ] } ] } ] }

Sorry again

[mb21]

thanks, yeah it's a bit tricky... there's also #8 that I never got around to resolve fully...