fix showAsModal settings modal #121
Description
After the change to the schema settings #49, using the PropKeyEditorObjectFieldTemplate causes issues in the settings modal for the showAsModal feature, where options don't have correct margins. The propKeyCollapse class in said template is removing unwanted bottom margins, but since the modal is rendered inside this template, each of the fields inside the modal is in some way considered a Collapse element and therefore is having its margins removed. It's a bit tricky, so it needs more investigation.