OEO: Add search bar to class viewer

[han-f]

I would really support adding a search bar to the textual class viewer

This was partially commented as part of #1911 which has a low priority right now.
I understand the low priority for the other parts of the issue, but would like to ask whether it may be possible to add this search bar anyway.

From my perspective as a user of the ontology, it would help dearly to be able to search in the textual viewer. Currently I search for terms in the visual viewer, then I copy and paste the URI into the textual viewer to see the definition in a "proper" and clean layout. Then I copy and paste the textual viewers URL into any product I use because I want readers to see the textual version that works well, rather than the visual viewer version which still could improve.

If this is not a complicated feature to add, I would be grateful if this could be tacked.