fixing manual operations

The bend & CUT bottoms are better switched in places => the CUT is
always the last operation
All the bottoms should have more space in between
The forward/ backward are to have a centimeter text box beneath them,
just like the Bend => it should be easier to implement this way;
You do not need to write PHP code to determine if the user kept the
bottom pressed, and then call another function once released
I can use the same C program that was used in the automation => which
takes length as parameter