Changing Behaviour Of Leftclick+drag On Adv.edit "mul" Value

currently, if you leftclick&drag the editbox of the “Mul” value in Advanced Edit, it adds/subtracts 1.00 to the current value; rightclick&drag adds/subtracts 16.0.

also, the value can be dragged up to negative values, which really does not make sense.

what i propose:

leftclick&drag unit: 0.1
rightclick&drag unit: 1.0

lower bound: 0.0

PS: same goes for “Div”, of course