I understand that you are trying to hide the values in the non-relevant fields in the Hue UI. For ex: _version_
But, this would not be possible by making changes in the managed-schema (or schema.xml) of a Solr collection. Changing a schema would be changing the behaviour of how the indexing will happen in the Solr service for the collection.
Adding to the use case, Hue, will only show what is indexed by solr and given back. It apparently, has very less control over the actual data. It is sort of proxy between you and Solr. The one who is just shows what Solr service gives.
For "stored=false" & "indexed=false":
When you set "indexed=false" -> You might totally skip the indexing feature for that particular field.So, you will never be able to search a document in Solr with that field detail. Ex: id.
When you set "stored=false" -> The purpose of the stored attribute: to tell Solr to store the original text in the index somewhere. Sometimes, there are fields which aren't searched, but need to be displayed in the search results.
I hope this answers your questions.