3.7.0 menuindex edits via grid not saved

[travisbotello]

With version 3.7.0 menuindex edits via grid (inline editing) are not saved.

Steps to reproduce:

• create collection
• add 2-3 child resources
• alter menuindex via grid
• save the collection
• reload the collection => menuindex values were not saved

MODX 2.7.1 Collections 3.7.0 PHP 7.3

Issue doesn't occur in version 3.6.0

[tonyklapatch]

I'm also getting this error on 3.7.0. This error is being logged in the JS console, no request is being sent to the server.

[mit0787]

I have same problem not only for menuindex but for all editable fields

[travisbotello]

We reverted to 3.6.0 in our production installations.

[JoshuaLuckers]

This issue also affects other grid editors (combo, custom etc).

[JoshuaLuckers]

The function doEncode is part of Ext.util.JSON.