NTS-1 mkII: String parameter value with a dot scrolling frame skip

[dukesrg]

String parameter values with a dot "." symbol are scrolled with frame skip.
The dot itself does not occupe the whole posiiton in the LED display as it uses a decimal point segment of the previous position letter. The effect is for example with "E.Piano 1" string:
| E|
| E.P|
| E.PI| <- this "frame" is skipped during the scrolling
|E.PIA|