GUI: ScientificSpinBox nullifies parameter value

In JobRealTimePanel and FitPanel if the user will edit the value via spinbox, not slider, then he will see the following:

Before start:

1

After double-clicking on the parameter its shown value is 0:

2

If the value will be edited, the on editing finished the value 0 is applied to the parameter:

3

Edited by Mikhail Svechnikov