Nested Quill Editors and MutationObserver

[kadams-turner]

I am having an issue with quill editors nested inside of quill blots (imagine an image blot with a title field that is a quill richtext editor). In Parchment’s scroll.ts, the MutationObserver for the parent editor hears any mutation in the nested field, and applies the change to itself. This leads to behavior where text typed in the nested field is applied to both the nested editor and the parent editor. I believe this behavior can be fixed by checking the target node of the MutationRecord, looking up the parent tree for the closest .ql-editor, and only applying the update to the quill instance with that DOM node. I am using quill version 1.3.3