Bring back the ability to hold Shift + click on pinned icons on Taskbar to open multiple instances

HotCakeX 

I too missed the shift-click feature at first, until I realized the new way, middle-click, brings the taskbar behavior in line with middle-clicking on links in web browsers, which opens a new browser tab (or new window back in the tabless pre-historic days).

Now that I realize this, I prefer the new behavior as it means I don't have to use two hands to perform the action.