The `change` event was previously required to ensure that the Customizer picked detected changes to the widget's content and synced them to the preview. In the current state, though, the `trigger( 'change' )` is no longer required and is causing issues with the widget's “Done” and “Save” buttons.
Merges [44816] to the 5.1 branch.
Fixes#46335.
Props audrasjb, afercia, westonruter.
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