fix: Add remaining/elapsed display on BW telem topbar

[3djc]

While @pfeerick was couting sheeps, request : #3856 (comment)

Handles remaining/elapsed display on BW telemetry screen topbar and move to HH:MM:SS format

[lightbulbjim]

Would it make more sense to do:

if timer < 60 minutes
MM:SS
else
HH:MM
end

This matches the format of both the home screen and voice callouts.

[pfeerick]

Thanks JC :)

My only concern then would be that it wouldn't be quite as... obvious? ... that one is the time, and the other not the time (although the same could be said if it is counting up, and active 🤭 )

I'll let the PR author case the deciding vote 😆

[3djc]

My concern exactly. Because this is a screen designed to be read while you fly, you don't have the luxury to leave your eyes on this screen for a couple of seconds to see if right collum is counting quickly (hence MM:SS) or not. HH:MM:SS is unambigous imho. I had concider adding an arrow or something to show if remaining or actual was displayed, but dit not find one that wasn't confusing

[lightbulbjim]

Makes sense. Thanks!