What is Blender 2.8 alternative to ctrl+shift+alt+c? (Set Origin in 2.8) I don't understand how i can move the orange dot which is my origin to the center of my active object? I could do this before in blender 2.79 with CtrlShiftAltC and it was BEYOND useful. Now my whole workflow has slowed to a glacial place because I cant figure out how to centralize the origin point to my active object NOT to the center of the whole model?

I need the active point to be in the middle of the highlighted object (building on the top left).
Header menu > Object > Set Origin > Origin To Geometry. And if you right click on this function you can add it in your Quick Favorites. I don't know why they removed the shortcut though.