Fix QRCode generation with mode: Symbols, clarify UI
Close #150 (closed)
This MR does two things:
- fix the creation of QR Codes based on symbols (the unit test was just wrong)
- Group the settings that correspond to the different draw modes into workbook tabs so it's clear what the user has to enter:
The first commit can be backported to 1.1.x; the second commit changes the format of the command line parameters so it should only go into 1.2.