Fixed a bug.
Set up tab for editing the current selection.
Pressing N adds a new child.
Fixed a bug with deleting elements from arrays.
Fixed a bug, removed error message when deleting out of a new prop input.
Trying to add a prop that already exists has you edit that prop.
Removed a log.
Compressed child validation error messages for closed collections.
Tweaked errors to float better.
Deleting an element selects the 'next' element.