Allow multiple funders for Software Spotlights
This MR supersedes !476 (closed), because I was unable to push into @axel.loewe 's branch.
Commit f79b6de3: This is a suggestion to solve the issue when displaying multiple funders. In that case, if there are specific requirements to be met, it was difficult to distinguish the individual funders. Now, mutliple funders are shown as a bulleted list. If only one funder exists, <span> will be used instead.
Commit 229cf5ac (current state): Uses expandable list elements.
Edited by Uwe Jandt (DESY, HIFIS)