error on next Reload when partially updating readinglist

[SaltatorMortis]

everytime when you partially update your chapter of any novel, iE Chapter 15 to Chapter 20 of 30, you will get a error after the next Update until you restart the Extension or your Browser.
before the Update the right Url (/extnu/ url) is displayed in the Pupup.

looks like the building of novel.next fails.

[SaltatorMortis]

maybe look for this one into the popup.ts
for me its look like a getter gets saved, thus causes the problems after closing the popup (Dead object)

[Spark-NF]

Indeed, I guess when setting the current chapter, some corrupted data from the popup slips into the background data, causing the "dead object" error.

Steps to reproduce:

1. Open popup
2. Edit novel chapter to some other chapter (except latest)
3. Close popup
4. Wait for auto-refresh or re-open popup and click "Refresh"
5. Error