Steps to reproduce:
1. Go to platform ui admin interface, to "Admin Panel -> Sections";
2. Create a new Section called "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
3. Go to Content Structure and create and publish some content, then assign it to the section you just created;
4. View the content on admin interface and switch to its Details tab. Scroll down to Section Details.
The Section Name overlaps onto under the rightside Action menu.
I believe one should use the technique used so far for long strings, here, which is to trim it and replace the end with "(...)".