Jsoneditor

- Fix option `showErrorTable` (see 1515):
- a console warning was logged when using the option `showErrorTable`
- `showErrorTable: false` was not working
- `showErrorTable` was not working for `preview` mode
- Upgraded to the latest version of `ace` and `jsonrepair`.

- Fix 1515: a console warning is logged when using the option `showErrorTable`.

- Implement option `showErrorTable` to customize in which modes the error table
shows up initially (1497). Thanks magedhennawy.
- Upgrade to the latest version of Ace editor, `v1.15.2`.
- Upgrade to the latest version of jsonrepair, `v3.0.2`.
- Fix 1208: source map issue "Could not load source file "0" in source map"
(1499). Thanks joshkel.

- Fix 1470: update the code of Selectr from `2.4.0` to `2.4.13`.

- Upgrade to the latest version of Ace editor, `v1.10.1`.

- Implemented 968: support for auto-completion based on JSON Schema (1435).
Thanks meirotstein.
- Upgrade to the latest version of Ace editor, `v1.6.0`.