Internet search brings me to this post, and a few other similar posts, which all says that we need to enable "SharePoint Server Publishing Infrastructure". I am pretty sure that would work. However, "Publishing" feature is really a big chunk of stuff, and we lose "save as template" functionality after enabling it. I don't want to do that.
Thanks for the post All SharePoint Features, we can simply enable "Asset Library" feature, through the PowerShell script below.
Enable-SPFeature -identity "AssetLibrary" -URL "http://SiteCollectionUrl.company.local"