Add a "Do not count first rep" checkbox for each exercise

When doing exercises where you start each set by setting up the lift (lifting the barbell/dumbbell up in position) it is often counted as a rep, thereby making the % Velocity Loss useless for the set.

I know it's possible work around it by setting up very slowly or with shorter distance than set as minimum for the exercise, but on some lifts, for example kicking up the dumbbells to do bench or shoulder presses, that's not always possible if going heavy.