Provide a convenience fields.linkedcollection model to handle common
use-case of using @ref in a Mistral WB. Cover it with unit-tests as
well all scenarios of using fields.linkedcollection in MIstral WB.
Change-Id: I97a61262db4cc521b5c230667a49b99701318f3f
Closes-Bug: #1467514
Now all standard actions are put into top-level
Barricade object in WB controller and then Base field
just fetches id-s from them (and we use them same
standardActions top-level property for resetting a
'Base Input' field with a list of keys corresponding
to a specific standardAction.
Also new unit-tests (for filters and for dictionary
Merlin model) are added.
Change-Id: Ieb6e9330db8fbeb83e4f0f2a64611e1b6b31006c
Closes-Bug: #1467511
Timur Sufiev