Waypoints can be moved in Flight Data window

This should not be normal behaviour as this is the Flight Data screen and we have a separate Flight Plan screen for this.
A double click also adds a waypoint.

Start by reproducing the waypoint movement and double-click behavior in the Flight Data window, then trace the window's waypoint and mouse-event handling to find the relevant entry point. Done means waypoints cannot be moved or added from Flight Data while the separate Flight Plan screen retains that behavior.

Written by the indexing model from the issue text.