[6540] Inherited item selector field issues

[jvega190]

craftercms/craftercms#6540

[jvega190]

@rart I figured out a way of getting the inherited model id when inserting a component (without using the map). When rendering the spinner (while the element is rendered) we get the daddy element from the record, so at that moment I can get the model-id from the element (the one that freemarker uses to render it)