Fix fullscreen message lcd_update handling

Firmware/lcd.cpp

@@ -702,6 +702,7 @@ void lcd_update(uint8_t lcdDrawUpdateOverride)
 
 void lcd_update_enable(uint8_t enabled)
 {
+	// printf_P(PSTR("lcd_update_enable(%u -> %u)\n"), lcd_update_enabled, enabled);
 	if (lcd_update_enabled != enabled)
 	{
 		lcd_update_enabled = enabled;

Firmware/ultralcd.cpp

@@ -3131,8 +3131,6 @@ void lcd_show_fullscreen_message_and_wait_P(const char *msg)
 				if (msg_next == NULL) {
 					KEEPALIVE_STATE(IN_HANDLER);
 					lcd_set_custom_characters();
-					lcd_update_enable(true);
-					lcd_update(2);
 					return;
 				}
 				else {