Now when I merge two cells with right-click "Merge Cells", they merge with the results included, while I only want the commands merged. Can I make it a one-click button?
Now I have to delete the results first then merge.
First select just the input cells. command-click will do this on OS X, but I don't know what the Windows equivalent is. Your selection should look like this
Then, with the mouse cursor on one of the blue highlighted cell brackets, right click and select Merge Cells. This produces