Multicombo related issue

Hello webix team,

Please refer this snippet:https://snippet.webix.com/ob72xcld

Here, after selecting ‘All’ option all options get select and in inputbox it shows all options value sequentially. Now, I want to select all options but in input box only one ‘All’ option value should be shown.Please provide me solution.

https://snippet.webix.com/8bgdehhj

Hello intregal,
Thank you so much for the given solution.
After selecting ‘All’ option if I unselect ‘All’ then it should automaticaaly unselect all remaning options.Please provide me solution for it.

https://snippet.webix.com/nnz3yx2p