ONLY_PEOPLE_NR_LIST saved wrong in .pet file

when chosing people people for show only people list e.g. range 86-136 and e.g. 83 is writen in show only people and then pressing save. 83 (the value of show only people) is stored in the pet file instead of 86-136

gui:

pet-file:

added bug label

Issue seems to be in the writing of the pet file.

created merge request !157 (merged) to address this issue

mentioned in merge request !157 (merged)

closed with merge request !157 (merged)

mentioned in commit 4a76d037