Fix nuxeo-directory-radio-group in Edit mode

Steps to reproduce:

1. deploy the attached jar to nxserver/bundles and start Nuxeo
2. navigate to your personal workspace
3. create a RadioButtonDirectory document
4. set the different fields and push the Create button
5. observe that the document is created with the defined values
6. edit the document
7. set new values and save
8. observe that the new values are not saved on the document <== this is the bug

If you open the Console, you'll see this Javascript error

954.bundle.js:3873 Uncaught TypeError: Cannot read properties of undefined (reading 'forEach')
    at e._updateSelected (954.bundle.js:3873:487)
    at Object.T [as fn] (main.bundle.js:13270:69925)
    at L (main.bundle.js:13270:69442)
    at e._propertiesChanged (main.bundle.js:13270:80713)
    at e._flushProperties (main.bundle.js:13270:61740)
    at l.__enableOrFlushClients (main.bundle.js:13270:79143)
    at l._flushClients (main.bundle.js:13270:78880)
    at l._propertiesChanged (main.bundle.js:13270:80667)
    at l._flushProperties (main.bundle.js:13270:61740)
    at l._invalidateProperties (main.bundle.js:13270:78698)

It seems that the call to Directory.SuggestEntries is done too late and this._entries is still null when this code is executed (where "this" is a "nuxeo-directory-radio-group" element)

Expected behavior: the edited values are correctly saved