Optional options for RichSelect editing

[sbscan]

Not very often but sometimes we need to show different options but let user edit only some of them.
Maybe we can make 'optional' options for richselect. If defined, the select should use these options.

[Natasha-eng]

Hello @sbscan ,

This feature isn't available in the grid editors right now, but we can consider adding it in the future, and I’ll make sure to note it as a proposal. Thank you for your suggestion!