Up- and down do not work in object editor

### Steps to reproduce the behavior
* Go to https://www.notebook.ai/plan/characters/new
* Enter a name (or any other field) with a line break
* Try to use the up and down keys

I did not try out all forms below "Worldbuilding" but I assume that this issue affects all of them.

### Expected behavior
The mouse cursor should mo up/down to the next line.

### Actual behavior
It doesn't.

Open the character form at the reported URL and reproduce the problem in a multiline field using the up and down keys. Inspect the object editor entry point responsible for that form; done means the cursor moves to the corresponding position on the previous or next line.

Written by the indexing model from the issue text.