[#79] Compatibility adjustment for action's value on 2.3.0+
[#82][#92] Give limit option for number of children to revert grid to tree.
[#81] AJAX loop for actions
prepare GCK for 2.3.0 histeria
[#76] fix bug on dragging fields brings back description field and removes output filters and titles

[#79] fix compatibility adjustment for action's value on 2.3.0+
[#89] Field Order bug
[#94] Add permissions for containers
[#95] fix error when context_key is not in the list of fields to show in the child list