Tree: fix registerNode error when nodeKey is 0

* Add button style to checkbox

* Implement min/max for checkbox button group

* Fixing a display bug when chekbox is ':checked'

* Update docs to integrate example button+min/max option

* Register correctly checkbox-button
Last fixes after cherry pick and bad rebase...

adding Ukrainian translation

Czech localisation

错误：`prev`表示上一页，`next`为上一页

应为：`prev`表示上一页，`next`为下一页

* Add make new English error message

Currently, only Chinese error message is displayed when running
make new command without arguments.

* Update CONTRIBUTING.en-US

* when tab  is disabled, disable remove handle.

* disable remove when tab disabled

In order to avoid confusion when posting the form using regular non-xhr requests.
Also do not clear input value after `handleChange` event.

Catalan translation