Sub-GHz: Fix GPS "Latitute" typo, switch to "Lat" and "Lon" in .sub files

[m7i-org]

What's new

• Fixed a typoin the SubGHz GPS coordinates for reading/writing sub files

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For the reviewer

• I've uploaded the firmware with this patch to a device and verified its functionality
• I've confirmed the bug to be fixed / feature to be stable

[Willy-JL]

this is a breaking change, existing files would not be parsed correctly after this change. if you want, you can add backwards support for the typo version

[Willy-JL]

also there are others that rely on the broken spelling, since it has been there for so long. for example, hackrf portapack mayhem firmware has a wardrive map which supports flipper sub files with latitute typo. @htotoo might want to keep this in mind if we do go ahead

[htotoo]

Thanks for the ping, will check on it!

[m7i-org]

Fair point, it is indeed a breaking change.

Shall we then rather agree on keeping "Latitute","Longitude" retro-compatible for reading sub files and moving on to "Lat","Lon" for reading/writing from now on?

Then I think the switch makes more sense.

[m7i-org]

Switched to "Lat","Lon" and looking for the older values in case they're not found.

Added an extra check to make sure that we don't run in the null island problem when reading sub-files.

[htotoo]

Imho lat / lon seems a good solution also the fallback part. I'll implement it the same way in Portapack.

[Willy-JL]

LGTM 💯