Infoboxes => Height GPS
Displays options 'British','US','European' (for example!)

These 'friendly' settings names make the following changes to the configuration tree:

British
=>infoboxes.height_gps.label=aircraft.height.ft
=>infoboxes.height_gps.comment=aircraft.height.m
US
=>infoboxes.height_gps.label=aircraft.height.ft
=>infoboxes.height_gps.comment=none
European
=>infoboxes.height_gps.label=aircraft.height.m
=>infoboxes.height_gps.comment=none

User chooses 'European'

=>infoboxes.height_gps.label=aircraft.height.m
=>infoboxes.height_gps.comment=none

User clicks on 'advanced' icon or similar

The advanced items are displayed in a list:

infoboxes.height_gps.label=aircraft.height.m
infoboxes.height_gps.comment=none

User changes comment to 'aircraft.height.ft', accepts changes

=> XCSoar performs a diff against the friendly settings names and displays the closest one with an icon indicating that an advanced setting has been changed / text showing the advanced item and its value

eg 'European *'

or 'European (comment=aircraft.height.ft)'