/collection/{slug}: show "New" badge only once

[0pdd]

The puzzle 1123-42494b3d from #1123 has to be resolved:

mystamps/src/main/webapp/WEB-INF/views/collection/info.html

Line 145 in c3e11aa

<!--/* @todo #1123 /collection/{slug}: show "New" badge only once */-->

The puzzle was created by Slava Semushin on 28-Dec-19.