Backport of PR-8246 for Magento 2.1: Fixes #7723 - saving multi selec… #13546
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…t field in UI component form
(cherry picked from commit ca9e33f)
Use underscore to fetch selected values as array
(cherry picked from commit 16170ce)
Description
This is a backport of #8246 for Magento 2.1
Fixed Issues (if relevant)
Contribution checklist