a workaround would be to tab on the desired waypoint and choose to jump to this waypoint. A little tricky if you also change camera orientation and waypoint speed within the mission but if you have enough spacing between the waypoints (which I guess is the case if you search row deer fawns with low overlap) it is possible. If you change the waypoint speed during the mission you have to wait untill the first waypoints have been past before choosing the waypoint to continue the mission.
I have done this before when sowing cattail seeds within 3 m altitude - there this does not work well because you cannot zoom in far enough and always hit the wrong waypoint. But I did mange it anyhow. Another workaround for such special cases would be to connect a notebook or tablet as additional groundstation - but only if you do such very special stuff in low altitude.
I hope the feature will be provided with the new update and a new version of QGC. There is a jump from 3.3 to 4, so this is probably anyhow a feature introduced in QGC 4?
I would be interested to see your approach of row deer fawn rescue, we are working on that too (as volunteers and researchers for more than 10 years and as technology provider).