charge method for report_mig_mult
Unique the other report classes where the charge method is only used by the graphical interface to collect and test objects in the environment envir_stacomi, and see if the right choices have been made in the graphical interface, this method is used to load data on migration control operations fishway operations, and counting devices operations as data from those are displayed in the main plots.
# S4 method for report_mig_mult charge(object, silent = FALSE)
An object of class report_mig_mult-class
Default FALSE, if TRUE the program should no display messages
report_mig_mult with slots filled by user choice