Cannot edit Item after adding if we run into Item Lazy loading

thanks!

- fix pushed to the develop branch

you're right - i can reproduce the problem with our sample application.

steps to reproduce:

1. open http://localhost:4502/content/contextaware-config-sample/en/config.html

2. open "Sample Configuration Very Long List"

3. click "Add Item" and choose an name

expected: new item is disabled and can be edited
actual: new item is disabled, but cannot be edited. the link "click to edit config" does not help either.

workaround: add new item, save list, reload, edit new item

it works with a short list, e.g. sample configuration "Sample Configuration List"

can you have a look?