Refactor BaseElement to add a displayName field #331
Description
Currently, the elementName field of BaseElement divides set names with ~&~ , which needs to be removed upon display. Adding a displayName field with this already done removes the need to run replaceAll('~&~', ' & ') in every location where the element is displayed, improving code quality. Ideally the displayName field would depend on elementName and respond to updates to it.