When on the Feature List, should be able to have a column that shows the Idea the feature came from, so you don't have to open each feature 1 by 1 to see the Idea Id.
Thanks for sharing this idea! You can do this by adding a related record to the feature list report.
Click "Add records related to feature" and select "Ideas"
"Idea name" will be automatically added in the "Idea" section
Click "Save"
Any linked ideas will be listed in this field