Make MMU load failed blocking to workaround lack of resume print menu item.

The same workaround used as for USB print (Octoprint).

Firmware/Marlin_main.cpp

@@ -7768,7 +7768,7 @@ Sigma_Exit:
 	  	if (mmu_enabled) 
 		{
 			st_synchronize();
-			mmu_continue_loading(is_usb_printing);
+			mmu_continue_loading(is_usb_printing  || (lcd_commands_type == LcdCommands::Layer1Cal));
 			mmu_extruder = tmp_extruder; //filament change is finished
 			mmu_load_to_nozzle();
 		}
@@ -7812,7 +7812,7 @@ Sigma_Exit:
 #endif //defined(MMU_HAS_CUTTER) && defined(MMU_ALWAYS_CUT)
 				  mmu_command(MmuCmd::T0 + tmp_extruder);
 				  manage_response(true, true, MMU_TCODE_MOVE);
-		          mmu_continue_loading(is_usb_printing);
+		          mmu_continue_loading(is_usb_printing  || (lcd_commands_type == LcdCommands::Layer1Cal));
 
 				  mmu_extruder = tmp_extruder; //filament change is finished
 

Firmware/mmu.cpp

@@ -889,7 +889,7 @@ void mmu_M600_load_filament(bool automatic, float nozzle_temp)
     mmu_command(MmuCmd::T0 + tmp_extruder);
 
     manage_response(false, true, MMU_LOAD_MOVE);
-    mmu_continue_loading(is_usb_printing);
+    mmu_continue_loading(is_usb_printing || (lcd_commands_type == LcdCommands::Layer1Cal));
     mmu_extruder = tmp_extruder; //filament change is finished
 
     mmu_load_to_nozzle();