Merge pull request #9068 from Bob-the-Kuhn/SD-detect

[2.0.x] SD card detect improvement

Marlin/src/lcd/ultralcd.cpp

@@ -4950,6 +4950,7 @@ void lcd_update() {
     if (sd_status != lcd_sd_status && lcd_detected()) {
 
       if (sd_status) {
+        safe_delay(1000); // some boards need a delay or the LCD won't show the new status
         card.initsd();
         if (lcd_sd_status != 2) LCD_MESSAGEPGM(MSG_SD_INSERTED);
       }