Jsoneditor

- Fixed dragging and selecting multiple nodes not working
(regression introduced in `v5.26.1`).

- Fixed `.update()` throwing an exception when replacing a JSON object
with `null`. Thanks DullReferenceException.
- Fixed 598: Search field can't be focused in object view.

- Implemented option `mainMenuBar` to enable/disable the main menu bar.
Thanks tanmayrajani.

- Implemented options `enableSort` and `enableTransform` so you can turn off
these features. Thanks tanmayrajani.
- Fixed 590: validation failing in code and text mode when status
bar is disabled.
- Fixed 589: the path in the navigation bar is not updated
when duplicating or removing a node, and neither after an undo/redo action.
- Fixed duplicate and remove of the action menu of multiple selected
nodes not working.
- Fixed not preventing default selection of text when selecting nodes.
- Fixed 595: navigation bar path link not working.

- Fix 582: parse error annotations not always up to date in
code editor. Thanks meirotstein.

- Fix 548: `import JSONEditor from 'jsoneditor'` not working in
TypeScript projects (gave a constructor is undefined error).