Built-in filtering for StandardLookup / PickerField.Lookup chain

[alexbudarov]

See forum topic: https://www.cuba-platform.com/discuss/t/lookup-field-choose-particular-values/11339/4

If I am not wrong, we have received such requests several times: "user should can choose only particular values in the lookup screen".
Alexey has been talking about it for some time.

It looks like a generic functionality: add filtering capability to standard lookup action and standard lookup screen.
E.g. PickerField.LookupAction can have a install delegate to supply lookup screen filter parameters.
StandardLookup obtains these parameters and adds them to dataLoader query.

If I were using this, I would also modify lookup screen's caption (another customization point). E.g. lookup screen called by CUBA's "Move user to another group" action could have caption "Select new Access Group for user Administrator".

[alexbudarov]

another one https://www.cuba-platform.com/discuss/t/lookuppickerfield-filter-values-on-lookup-option/13180