[Enhancement][Form] Allow binding Field to nested properties

[kdikov82]

Currently, if a Field is set to a nested property (user.name for example), the setter of the Form will handle this as a string and will not try to set an inner property.

The expected result would be "user:{name: value}" instead of "user.name: value".

A temporary workaround is to modify the onChange of the Field component to return the complex object with added nested property:
https://stackblitz.com/edit/bqbxnr-fppiza?file=src%2FFormMultiSelectField.vue,src%2Fmain.vue

[mpricope]

Actually this seems to be a bug as per documentation this is hinted that it should be working as this:

https://www.telerik.com/kendo-vue-ui/components/form/api/FieldProps/#toc-name

The name of the field in the Form state. Supports nested fields in the user.age and users[index].name formats.