Adding Ctrl+V to paste song segments

### Enhancement Summary

To help beginner's workflow's making it so you can Ctrl+C a clip and Ctrl+P to paste it at the selected location.

### Implementation Details / Mockup

Currently, you can copy and paste a song segment by holding Ctrl and dragging it from where the original is to where you want to copy it. While very efficient (and cooL), it isn't intuitive and a Ctrl+C on the original clip and Ctrl+V on the place where you want to paste the clip would be intuitive and helpful for beginner workflow and then they can further optimize later by learning the Ctrl Drag functionality.

### Please search the issue tracker for existing feature requests before submitting your own.

- [X] I have searched all existing issues and confirmed that this is not a duplicate.

No files, tests, or entry points are named. Start by tracing the existing Ctrl-drag song-segment copy behavior and selected-location handling; done means Ctrl+C stores the selected segment and Ctrl+V inserts a copy at the selected location without breaking the existing workflow.

Written by the indexing model from the issue text.