Why is the peek icon hidden in the list view unless you happen to hover over exactly the right place?, I started a chat session to ask why it wasn't available in the list view - it turns out it is there,  but it is hidden unless you happen to hover the mouse in exactly the right place!

I am very computer savy (i've worked in IT over 25 years now) and if I didn't know it was there - then who else is unaware that this icon exists!  Why is it not just permanent on the screen next to the word open ?

I was told this was to "save screen space/stop the interface being cluttered".   - Hmmm I'm not sure that is a justifiable reason!