Manual "High Voltage mode" indication

[ZhenyaUsenko]

As ZenTimings currently can not detect High Voltage mode, is it possible to add a manual checkbox for the user to specify if he is using HV mode or not (as a temporary solution, until there is a way to detect HV mode automatically).

Checking this checkbox will alter VDD/VDDQ calculation to be in-line with the real voltage.

It will greatly help with the readability of ZenTimings screenshots.

[irusanov]

I will think about it for the next release.