Null boxart and release date

[suspect15]

Before boxart is added to a game page, nothing is shown in the boxart section of the page, however once boxart is added, the page cannot seemingly be restored to a state where there is no boxart again.

Similar problem with the release date where once a release date is added, there's no way to remove it.

Both of these have been issues for QA when RAcycling abandoned pages or accidentally adding boxart to games that don't actually have boxart (such as homebrews).

[Chew]

Box art and other icons clearing was implemented in #4801 (not yet released)

I believe clearing release date is still pending