Exclude slides from search

I have submitted this as a feature request but I guess it does not hurt to post it here as well.

It should be possible to decide for each slide if it should be included in the search or not.

Context: Some scenes in my course are software simulations, with different screenshots on different slides. Users should navigate these simulations only by clicking on the slides (hitting hotspots leading them to other slides). These slides are not included in the menu. But: When learners search for key words, they can still find (and access) these slides (in case the key word is somewhere on that slide or in the slide title).