Issue Description:
In New UI, when there has multiple notifications, the Notification bell badge max value is 5
Environment:
Build: quay-operator-bundle-container-v3.15.0-16
Browser: Chrome, Firefox
Steps:
1, Create any "Red Hat Quay Notification" like Push image, and push 5+ times to the repo
2, Check the number shows on the bell icon
Actual Result:
Shows 5 even 10 events there 
quayregistry-quay-database=# select count(*) from notification;
count
-------
10
In Old UI, it shows 5+

From old UI, this looks by design, but in our doc, I don't find any directions
Proposal:
1, Same with Old UI, show 5+ when more than 5, and has a note in official doc
2, If the design is due to page loading performance, still show 5 and others lazy load with Pagination
- is incorporated by
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PROJQUAY-8710 Quay new UI known issues List
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- New
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