Change some spinbox settings

• mask parameters should have fixed step, depending on axes range (now logarithmic step)

• min/max fields: show in scientific format, set log step

changed milestone to %v22

added GUI inconvenient UI labels

assigned to @m.svechnikov

changed the description

mentioned in merge request !2857 (merged)

mentioned in commit 1628e763

marked the checklist item min/max fields: show in scientific format, set log step as completed

mentioned in merge request !2864 (merged)

mentioned in commit 04c51949

closed with merge request !2864 (merged)

marked the checklist item mask parameters should have fixed step, depending on axes range (now logarithmic step) as completed