Read only actions for picker fields in Jmix 2

[ghost]

It would be useful to be able to control which actions are visible in read-only mode for the following components:

EntityPicker MultiSelectComboBoxPicker ValuePicker MultiValuePicker EntityComboBox

Currently all actions are invisible in read-only mode

[glebfox]

Possible solution:

1. Don't hide actions slot at all
2. An interface similar to AdjustWhenReadOnlyView is required, e.g. AdjustWhenReadOnlyField.

[manuelhummler]

That would be really helpful! I like to avoid the Java code I currently use for this!