docs: clarify editableList resize* callbacks are related to physical size, not item count

Current Behavior

It appears that the resize() and resizeItem() callbacks on editableList do not get called as they should when an item is added or removed from the list, unless I am misunderstanding the docs.
resize() does get called when the node dialog is initially opened, but not thereafter and resizeItem seems never to be called at all.
I have not attempted to use them before so don't know whether they have ever worked.

See also forum post https://discourse.nodered.org/t/problem-with-editablelist-resize-callback/88263 where @marcus-j-davies confirms the behaviour (of resize at least).

Expected Behavior

No response

Steps To Reproduce

No response

Example flow

paste your flow here

Environment

• Node-RED version: 3.1.9 and 4.0.0-beta.3
• Node.js version: 20.5.1
• npm version:
• Platform/OS:
• Browser: Edge on Ubuntu

Issue にリンクされている editableList の resize オプションのドキュメントから始め、関連するフォーラムの議論を確認してください。resize() および resizeItem() コールバックは項目数ではなく物理的なサイズに関するものであることを明確にし、Issue とフォーラム投稿で説明されている確認済みの動作と一致した時点で、ドキュメント化された動作は完全なものとみなしてください。