absent: ext-hasoneassociation component

[fabriciomurta]

Found: Ext.NET 7.0.0-preview4_2020-07-13.

This issue is very similar to #1792 and its treatment will probably be the same taken here.

Documentation: Ext.data.Model.association - Ext JS 7.2.0 docs

This looks like this usage is deprecated since Ext JS 6.2.0 (Ext.NET 4.x), so this shouldn't be supported anyway and examples using this should be rewritten to use the new supported syntax.

WebForms examples matching HasOneAssociation

1. Associations > HasOne > Simple
2. Associations > HasOne > Simple_Lazy_Load

[fabriciomurta]

Issue #1793 will potentially determine how this one should be handled.