Insidious waypoint command change in Plan view

[yuri-rage]

Issue details

In Plan view, if a waypoint has focus in the table, an accidental arrow down key press or mouse wheel down action will change the dropdown selection from WAYPOINT to RTL, which could have severe consequences if uncaught by the user (actually happened on a Rover, and a user's mower went on a mildly destructive path until he caught it and emergency stopped).

Steps to reproduce:
Create a mission of any number of waypoints.
Mouse click on a waypoint in the table (or tab to focus on the command dropdown).
Arrow key or mouse wheel down changes the dropdown selection (could be very insidious).

Not sure if there's a way to "prevent default" or similar, as with web apps, but that would be the ideal solution - force an actual dropdown list selection vice "hotkey" selection.

Relevant Discord discussion:
https://discord.com/channels/674039678562861068/797946854792757259/1245948112510517248

Version

1.3.81, build 1.3.8914.1508 (though likely has existed for years)

Platform

[ ] All
[ ] AntennaTracker
[x ] Copter
[ x] Plane
[ x] Rover
[ x] Sub

Airframe type

All

Hardware type

All

Logs

N/A