Feature Req: Failsafe turns osd on

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Here is a feature request. I run a rangelink receiver, and in the event of a 
failsafe, apm doesn't know that it is in failsafe, other than I have it switch 
to RTL. What I request is a dropdown menu in config tool. If the flight 
controller is in (choose flight mode, such as RTL, Auto, or another one), then 
it will automatically switch to panel _____(1 or 2) until FM is changed back. 
This could work for any mode. 

Original issue reported on code.google.com by [email protected] on 5 Jan 2015 at 6:55