Wavelength can be set to negative

It should be strictly limited by 0, SpinBox should not allow setting non-positive values. This does not contradict to additional to checks in core.

changed milestone to %21 GUI fixes

added GUI bug labels

marked this issue as related to #340 (closed)

changed the description

mentioned in issue #340 (closed)

assigned to @ludwig.jaeck

mentioned in merge request !1455 (merged)

mentioned in commit d40817b6

closed with merge request !1455 (merged)