Shiny, BCG calculation pop up, add total N

[leppott]

Is your feature request related to a problem? Please describe.
In Shiny app after BCG calculation show number of samples outside experience of the model.
Show total N.

Describe the solution you'd like
A clear and concise description of what you want to happen.

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Current pop up

[leppott]

Also move "NA" message to end of pop up.