Fixes #2007: Handle full SD card in openLogs(). SD card info menu implemented for Taranis, added display of free sectors. Disk IO simulation (all ported from master)

radio/src/logs.cpp

@@ -59,6 +59,9 @@ const pm_char *openLogs()
   if (!sdMounted())
     return STR_NO_SDCARD;
 
+  if (sdGetFreeSectors() == 0)
+    return STR_SDCARD_FULL;
+
   // check and create folder here
   strcpy_P(filename, STR_LOGS_PATH);
   result = f_opendir(&folder, filename);
@@ -193,7 +196,6 @@ void writeHeader()
 #endif
 }
 
-// TODO test when disk full
 void writeLogs()
 {
   static const pm_char * error_displayed = NULL;