Freeze when Step==0

[Sönke J. Peters]

Thanks for this cool piece of software! (I accidentally stumbled over this by following a Google Search Link to Finger's Forum.)
Installation was flawless via pip on Arch Linux.

While playing with it, I realized that setting Step:=0 freezes the program. Maybe do a sanity-check for very small values, too.

PS:
I realized another small UI bug:
Entering numbers after the decimal separator is a bit strange, as it requires to delete a decimal place prior to entering.

[Oliver Dippel]

Thank you
I have released the latest source (v0.4.7) i think this bug is fixed there.

PS: i know the problem but can not fix it, depends on qt5

[Oliver Dippel]

if it not works, please reopen this bug