NMEA Passthrough: BUG FIX + Queue Display Feature Add

[aubreyshomo]

BUG FIX: When stopping the NMEA Passthrough via the screen, as opposed to serial, the stopscan function was never called, which led to the queue staying active after exit, promptly filling up available heap and forcing reboot.

FIX: Now call stopscan (via startscan(SCAN_OFF)) upon exiting the GPS menu, such as when leaving NMEA Passthrough.

SAFTEY MECHANISM ADDED: RunScan now checks if the scan is off yet the queue is on and disables it if so.

FEATURES ADDED:

1. Above bug fix and safety mechanism
2. Fixed all-on-one-line display of NMEA passthrough, printing each line of output on its own line
3. Now prints all text, and the final two sentences (GxGGA and GxRMC), and fills all available space on the screen (as defined by configs.h) with other sentences from the queue, using the available real estate fully.
4. Wrap is accounted for in the line count.
5. Wrap is now off for GxTXT parsed display.
6. Wrap is on (by default) for everything but the MINI, where it is off.
7. Dynamically sizes output for available screen real estate.

TESTED ON: Flipper Dev Board, Marauder v6 with GPS module (and screen)
PARTIALLY TESTED ON: Mini, no GPS module

NOTE: This fixes a bug I couldn't see until I had screen-capable hardware with GPS to test with. (I note I mentioned only headless had been tested in my last PR.) This version should be quite stable, but the display aspects have not been tested on the mini, I'm coding blind.

[aubreyshomo]

Screenshot of new NMEA Passthrough Screen Display:

Had it running all night, memory is fine, as long as the queue is either turned off or serviced.