ISTWCMS-5480: taking out the remove button from e/c for now

Eric Bremnerrequested to merge
feature/ISTWCMS-5480-exp-col-remove-buttons into feature/ISTWCMS-4866-ebremner-exp-col-block

ISTWCMS-4866: moving the heading selector for ec outside the individual ec settings and now to a global setting for the entire ec

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