Ability to resize "Show desktop" button
[WIN]+D or right-click taskbar > show desktop.
AdminRaMMicHaeL (Admin, moved) commented
v3.1 allows you to hide the button
If that size could be 0px (as per Michiels' comment) or it's position back next to the start button as per fr34ky, then I vote for this 100% before anything else.
Doors2Windows have a tool which pushes it "half-way" off the screen. (for me, but there are many videos showing it working completely for others on YT, there are also other people saying it doesn't work in different ways, but it may give you an idea. ^_^)
Michiel de Vries commented
Or to remove it all together
not only to resize, but also to move it's position!!!