the ability to right click an icon under components to remove all of that item type from the blueprint is gone.Most of the gui elements now work only with left mouse button, so other buttons might be used without interfering with gui.
(For clarity: Take big blueprint, right click the icon of small electric poles, all small electric poles are removed from blueprint. One click, many items removed)
Right clicking on the preview are still works, but the components portion broke between 15.12 and 15.13