openDialog Event doesn't works as expected

Problem/Motivation

Actually when we use entity_browser or Custom Modal dialog using "core/drupal.dialog.ajax" we have a problems when we close the modal, we can't scroll our page caused by an inline-css property "overflow: hidden;" on element.

When the dialog modal appear all works well just when the close event are fired the modal-open class are correctly toogled and disappear but the inline-css property " overflow: hidden;" stay and block all page that is a smally critical in my cases.

I have tested with adminimal and others back themes and all works works well for this part.

Thank a lot for this beautiful theme ;)

Proposed resolution

Identify and correctly remove the inline-css property : " overflow: hidden;"