Fix actions reducers for expanders in 16

[sneridagh]

Based on the work in #4946, this is a fix for 16 too.

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[cypress]

Passing run #6603 ↗︎

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Details:

Changelog
Project: Volto	Commit: aff6286558
Status: Passed	Duration: 14:47 💡
Started: Jul 25, 2023 11:14 AM	Ended: Jul 25, 2023 11:28 AM

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