fix: update parent checkbox state when new children are added dynamically

[felix-ico]

fixes #1774

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[acstll]

Hey, this looks good to go!
There's only one lint error, and prettier missing 👀

[felix-ico]

Hey, this looks good to go! There's only one lint error, and prettier missing 👀

@acstll I pushed a fix for the linter, but weirdly all the formatting errors were unrelated to the changes made here, so i opened a separate PR to take care of those..#2155, if you could have a quick look 🙏 not really sure how this happened though

nevermind all this, must have been a brainfart on my side, that PR is now showing 0 changed files