TM: Do not lockout the menus on thermal errors

This prevents the ability to run gcode from the SD card.

In a thermal error with faulty values, and without serial access, this
is the only way to process an M310 instruction and recover.

Firmware/Marlin_main.cpp

@@ -9612,9 +9612,6 @@ void ThermalStop(bool allow_pause)
         } else {
             // We got a hard thermal error and/or there is no print going on. Just stop.
             lcd_print_stop();
-
-            // Also prevent further menu entry
-            menu_set_block(MENU_BLOCK_THERMAL_ERROR);
         }
 
         // Report the status on the serial, switch to a busy state