Motivation
Users should be aware what they are looking at. As a first step, there should be a title that just says "footnote", but the goal is to show some categorization in the future (e.g. web link or publication)
Mock
Icon
Can be found in the OOUI Demos under Icons-editing-citations --> reference
Acceptance Criteria
- The header of a reference preview includes the described icon and the text Footnote