Bug: Powerpoint n summary incorrect

[js3110]

Description

The N in the powerpoint group slide should represent the number of subjects in the data, but instead it currently represents the number of rows per group.

To reproduce

Run NCA, export powerpoint and view N

Expected behaviour

Fix:
inst/shiny/functions/save_output.R line 150 should become:

    info_i <- merge(o_nca$data$conc$data, group_i) %>%
      # Group by cols from info vars that are in the data
      group_by(across(any_of(info_vars))) %>%
      summarise(n = n_distinct(!!sym(subj_col)), .groups = "drop")