Update of previously imported observed data after metadata change

[Yuri05]

For the use case described in #785: observed data sets imported from one data source using particular import configuration are identified by the combination of metadata used for grouping. E.g. if I import the table below and use the columns {Organ, Compartment, Species, Patient id} for grouping: 2 observed data sets will be imported. Every data set is identified by the combination of {Organ, Compartment, Species, Patient id}. However meta can be overwritten by user in the project (e.g. in example above: user would change a patient id for one imported observed data set). Now when updating imported observed data from a new source: how should we deal with such datasets?

Time [min]	Organ	Compartment	Species	Patient id	Concentration [mg/ml]
1	Brain	Plasma	Human	347	0,1
2	Brain	Plasma	Human	347	12
2	Liver	Plasma	Human	256	8
3	Liver	Plasma	Human	256	2

[msevestre]

In my opinion: Edit of observed data in PKSim and MoBi should be forbidden. In order to update data, user would need to update the source file and refresh the data set

[Yuri05]

In my opinion: Edit of observed data in PKSim and MoBi should be forbidden. In order to update data, user would need to update the source file and refresh the data set

agree