Crash upon exiting "item edition" window with Return key

[dracorpg]

PTree 2.0 process terminates within one second upon closing the "Item edition" window by pressing the return/enter key when the cursor is in a field. This is, of course, extremely frustrating when trying to quickly adjust the value of a property :)
Changes made in the "Item edition" window are applied and can be seen reflected in the main window in the split second before the app crashes.

To Reproduce

1. Open an existing PTree file (e.g. example.ptree) or create a new one and add at least a source to have something to edit
2. Double-click an item (source / regulator / load) to open its edition window
3. Click in any property field (changing its value is optional)
4. Press the return key
5. If the app doesn't crash almost instantly, repeat steps 2-4 a few times (I couldn't pinpoint what makes it crash vs. not crash, but it does happen a lot)

Expected behavior
No crash, of course!

Desktop (please complete the following information):

• OS: Windows (also confirmed on Fedora)
• Version: 2.0 (regression from 1.8)

[smariel]

Can't reproduce on macOS.
Also happens with ESCAPE.
Only happens with the keyboard, not the buttons.

It may be the default behavior of using keys to validate/cancel a form with the new version of Chromium (on Windows and Linux), interfering with the app process.
To be tested : add event.preventDefault() after triggering ENTER and ESCAPE in the event callback.

PTree/js/class.ItemEditor.js

Line 469 in 2bffeb4

$(document).keydown((event) => {