When "Discover" sidebar is enabled on homepage, some Community links are unclickable

[tdonohue]

Describe the bug
Visit the Homepage of https://sandbox.dspace.org (where "Discover" sidebar is enabled) & notice the first 3-4 Communities cannot be clicked on. The "Discover" sidebar appears to be overlaying some of the Community content as shown in this screenshot. Everything in the "purple" box is unclickable:

To Reproduce
Steps to reproduce the behavior:

• Can be reproduced as described above on Sandbox or on localhost (if running locally). Unclear if it is the same behavior on all browsers, but I'm testing in Chrome.

Expected behavior
All Community links should be clickable

Related work
Might be related to homepage refactoring in #2844 ?

[tdonohue]

@alexandrevryghem : This bug might have been caused by your homepage cleanup PR #2844. I suspect it's something very minor, but it obviously should be fixed. Let me know if you have time to claim & fix it (or just assign it to yourself if you want!)