Enhancement: Delete Data Selection and move to Settings

[Gero1999]

Description

1. All currently done in the tab Data Selection can be moved into Settings and adapted simplifying both code and UI

2. It will make more sense that the filterings of Choose the analyte and Choose the Dose Number are applied to the mydata$intervals instead of to mydata$data

3. It will make more sense that instead of a view of mydata$data dataframe, the user after pressing Submit (settings) obtains a dataframe of mydata$intervals

Blocked until #138 #146 are merged

Definition of Done