@Telgar: Great that you got it working!
@Noah Ivaldi: Thank you for looking at all these things so closely! It is a lot of work to transcribe all the PHB things into javascript and errors will be made unfortunately (especially because English isn't my first language).
Great catch on the background removal not working with the variant backgrounds! It will be fixed in the new version.
I will make all your suggested textual improvements in the next version, thank you sharing them!
Some things I want to comment on:
- The 2 with the "Vestments" was a typo. I got the 4 lb from the "Clothes, costume";
- Concerning the Gladiator's weapon: all things are optional, the backgrounds system is just to give you some easy pre-defined things to choose from. Building in all the options is just not always possible
- What do you mean by "Since you have guild merchant as a separate item, shouldn't the guild business selections be separated?" When you select Guild Merchant you get a different list of things to choose from than when you select Guild Artisan.
- Gladiator as an entertainer routine would be a possibility, but that would mean a lot of re-programming of the sheet, so I'd rather leave it as it is

I took the idea of leaving the Entertainer Routine an option for Gladiators from this text in the PHB: "though you migh also have some skills as a tumbler or and actor."
- I personally like the addition of the equipment as is. So I'm sorry, but I'm not changing the location of where the things appear

- The new version will have an option to set the DC calculation to nothing. I simply hadn't thought about the need for this.
- What do you mean with "when auto-adding weapons to the equipment list, the function does not recognize "x2" for quantity". Do you write "x2" in the weapon field like "Dagger x2" or in the description field?
Please keep coming with these kind of suggestions and spellchecks, they are greatly appreciated!