Generates a new copy of main R script file, ignoring options and replacing
source("_file_") lines with lines where the _file_ has absolute path and that matches
main file absolute path i.e.
For given file absolute path (with no name),
calculates new name until it is found not to exist.
If it is needed (>99) number of generation IDs may be extended.
Read options section and get variables names.
Only executes completely for the first time, when names are no set.
Variable names are returned in same order that appear in the script.
Specific case.
Parent component only in dialogs UTIL_BFF, UTIL_FEF and UTIL_FMF,
used in initialization process.
In other dialogs works like in general case constructor.