Do not show changelog tooltip when no changelog was provided
For example, when listing literature lists, and there was no changelog provided at the time the literature list was published, the changelog should not be shown in a tooltip, as it would be empty. As seen for R674168 on https://orkg.org/lists.
In the screenshot below, you can see the empty tooltip for Version 2:
Possible solutions:
- Do not show the tooltip when changelog is blank or null (this has the potential for users to believe that the tooltip is broken).
- Show "No changelog" as a fallback text.