Bug/settings adjustments

[js3110]

Updated so settings can be uploaded with no inclusions/exclusions

To do:

• [x] Check creation of settings works fine for all types of settings
• [x] Check upload works fine for different scenarios: no inclusions, some inclusions, changes in data points

[Gero1999]

Hello @js3110, the changes on the inclusions/exclusions settings work fantastic! Only thing is that I will consider:

• [x] Settings file not to save row number (write.csv(row.names=F))
• [x] IX is not needed and can be misleading, so I would also delete it from the settings
• [x] No use of hardcoding column selection, e.g instead of "select(USUBJID, DOSNO...)" use the PKNCA objects definitions: unname(unlist(myres$data$conc$columns$groups)) (or a reactive value that previously stored it) --> If this is already too late don't bother with it, I will just change it in the whole app in a future implementation

[js3110]

@Gero1999 changes made as discussed