I agree... Looking on that window all the time can be a disaster. But it comes with experience and may take years...Hiding is not the best idea but if it helps you to cope with your emotions, go on
Nearly every novice loves being glued to the P/L window - they did not plan the trade before entering, instead they fixate on the P/L window - riding the emotional roller coaster tick to tick of hope, fear, greed. This crowd is in casino mode and rarely lasts very long.
Anyway, I think that people have to work out a habit not to hide this window and to concentrate on trading more.