Extended collection selected variable

This is a suggestion for a “quality of life improvement” new feature. 

Current behaviour:

The variable selection within a collection and its extended collections are not synced.

When one selects a variable in an collection / extended collection, the variable selection can be different for a collection and its extended collection.

Steps to recreate current behaviour: 

1. Select collection P
2. Select variable A within that collection
3. Select extended collection (P extended)
4. Select another variable B within the extended collection
5. Switch back to collection P
6. The selected variable in collection P is still A

Expected behaviour:

The expected behaviour is that the selected variable should be synced between a collection and its extended collections.

Typical flow of a designer is to extend a collection and then modify specific variables within the extended collection. They switch back and forth between the collections to validate the previous variable value and the modified variable value.
 

Steps to recreate expected behaviour:

1. Select collection P
2. Select variable A within that collection
3. Select extended collection (P extended)
4. Select another variable B within the extended collection
5. Switch back to collection P
6. The selected variable is should now be B

Painpoint:

When the selections are not synced, the designer has to manually select the same variable in both collections, for every occasion when they select a variable for modification.

Benefit:

If the variable selection is synced across a collection and its extended collection, it will reduce an unnecessary step and source of frustration for the user.