Fixed a missing SD card error on start up, if the setup was blocked

by some dialog for an extended period of time.
Increased version to 3.0.8 final.

Firmware/Configuration.h

@@ -5,7 +5,7 @@
 #include "Configuration_prusa.h"
 
 // Firmware version
-#define FW_version "3.0.8-alpha"
+#define FW_version "3.0.8"
 
 #define FW_PRUSA3D_MAGIC "PRUSA3DFW"
 #define FW_PRUSA3D_MAGIC_LEN 10

Firmware/Marlin_main.cpp

@@ -1021,6 +1021,9 @@ void setup()
 
   // Enable Toshiba FlashAir SD card / WiFi enahanced card.
   card.ToshibaFlashAir_enable(eeprom_read_byte((unsigned char*)EEPROM_TOSHIBA_FLASH_AIR_COMPATIBLITY) == 1);
+  // Force SD card update. Otherwise the SD card update is done from loop() on card.checkautostart(false), 
+  // but this times out if a blocking dialog is shown in setup().
+  card.initsd();
 
   if (eeprom_read_dword((uint32_t*)(EEPROM_TOP-4)) == 0x0ffffffff && 
       eeprom_read_dword((uint32_t*)(EEPROM_TOP-8)) == 0x0ffffffff &&