fix: Prevent functional degradation if SD has less than 50MB free space (#3802)

* fix: Prevent functional degradation if SD has less than 50MB free space (#3730)

* justification: https://github.com/EdgeTX/edgetx/discussions/3666

- checks SD card free space at startup, start of logging and writing screenshots
- issues warning to user if SD card has less than 50MB free space
- will not write logs or screenshots if free space is less than 50MB at activation timerReset
- fixes crash of warning popup in logs.cpp (#3728)

* update: warning message if SD card fills up to threshold while logging

* empty commit

* call popup in non-blocking mode

* make b&w compatible to non-blocking popup calls

* 2nd attempt

* Popup:

- turns on backlight if dimmed due to inactivity setting
- if backlight is dimmed due to inactivity setting backlight can turnd on again by any controls

* #3599

* fixed b&w UI

* updated languages CN, CZ, DA, DE, FR, HE, IT, PL, PT, SE, TW

* chore: Update translations

* chore: Remove magic number

* chore: JP language update for SD card full (#3809)

* fix: Don't spam simulator log with file close msgs

---------

Co-authored-by: Michael <mha1@users.noreply.github.com>

radio/src/sdcard.cpp

@@ -30,6 +30,8 @@
   #include "libopenui/src/libopenui_file.h"
 #endif
 
+#define SDCARD_MIN_FREE_SPACE_MB 50 // Maintain a 50MB free space buffer to prevent crashes
+
 const char * sdCheckAndCreateDirectory(const char * path)
 {
   DIR archiveFolder;
@@ -463,7 +465,7 @@ uint32_t sdGetSize()
 
 uint32_t sdGetFreeSectors()
 {
-  return 10;
+  return ((SDCARD_MIN_FREE_SPACE_MB*1024*1024)/BLOCK_SIZE)+1;    // SIMU SD card is always above threshold
 }
 
 #endif  // #if !defined(SIMU) || defined(SIMU_DISKIO)