Changes

## You must be careful to prevent the user from hiding the popup by tricking it to go off-screen into either direction. If the popup was moving left and it got to the left edge of the page - it should move either up or down, wherever there is room.

# An expert will be able to close the popup (without using development tools) in only one way: make the window so small that the popup has nowhere to move and the X button can be clicked.