make it possible to define any sampling speed

[jawi]

Make it possible to define any sampling speed, as it is possible by the OLS hardware.

An idea might to make the capture rate combobox editable.

(reported by miro)

[jawi]

An additional use case on this is to more accurately measure the clock frequency of signals. For example, if you measure a multiple of the sample frequency, it can be measured more accurately then when measuring non-multiples...