Add SD-Card change and SD-Card init.

Add SD-Card change and SD-Card init. for reprap electronics without
SD-Chard change detect pin.

Marlin/ultralcd.cpp

@@ -199,9 +199,15 @@ static void lcd_main_menu()
             MENU_ITEM(function, MSG_STOP_PRINT, lcd_sdcard_stop);
         }else{
             MENU_ITEM(submenu, MSG_CARD_MENU, lcd_sdcard_menu);
+#if SDCARDDETECT < 1
+			MENU_ITEM(gcode, MSG_CNG_SDCARD, PSTR("M21"));	// SD-card changed by user
+#endif			
         }
     }else{
         MENU_ITEM(submenu, MSG_NO_CARD, lcd_sdcard_menu);
+#if SDCARDDETECT < 1		
+		MENU_ITEM(gcode, MSG_INIT_SDCARD, PSTR("M21"));	// Manually initialize the SD-card via user interface
+#endif		
     }
 #endif
     END_MENU();
@@ -516,9 +522,9 @@ static void lcd_control_motion_menu()
     MENU_ITEM_EDIT(float52, MSG_YSTEPS, &axis_steps_per_unit[Y_AXIS], 5, 9999);
     MENU_ITEM_EDIT(float51, MSG_ZSTEPS, &axis_steps_per_unit[Z_AXIS], 5, 9999);
     MENU_ITEM_EDIT(float51, MSG_ESTEPS, &axis_steps_per_unit[E_AXIS], 5, 9999);    
-#ifdef ABORT_ON_ENDSTOP_HIT_FEATURE_ENABLED
-    MENU_ITEM_EDIT(bool, "Endstop abort", &abort_on_endstop_hit);
-#endif
+#ifdef ABORT_ON_ENDSTOP_HIT_FEATURE_ENABLED
+    MENU_ITEM_EDIT(bool, "Endstop abort", &abort_on_endstop_hit);
+#endif
     END_MENU();
 }
 
@@ -889,10 +895,10 @@ char *ftostr31(const float &x)
 
 char *ftostr32(const float &x)
 {
-  long xx=x*100;
+  long xx=x*100;
   if (xx >= 0)
-    conv[0]=(xx/10000)%10+'0';
-  else
+    conv[0]=(xx/10000)%10+'0';
+  else
     conv[0]='-';
   xx=abs(xx);
   conv[1]=(xx/1000)%10+'0';