fix(plugins): display correct tooltip (fixes #3342)

[jonaschn]

SUMMARY

Fixes #3342 Display the correct tooltip information for chord charts (source and target values were switched)

BEFORE

AFTER

TESTING INSTRUCTIONS

Example SQL Dataset:

SELECT 'Alice' AS source, 'Bob' AS target, 5 AS interactions UNION ALL
SELECT 'Alice', 'Charlie', 3 UNION ALL
SELECT 'Bob', 'Charlie', 2 UNION ALL
SELECT 'Charlie', 'David', 1  UNION ALL
SELECT 'Bob', 'David', 4

ADDITIONAL INFORMATION

• [x] Has associated issue: #3342
• [ ] Required feature flags:
• [x] Changes UI
• [ ] Includes DB Migration (follow approval process in SIP-59)
  • [ ] Migration is atomic, supports rollback & is backwards-compatible
  • [ ] Confirm DB migration upgrade and downgrade tested
  • [ ] Runtime estimates and downtime expectations provided
• [ ] Introduces new feature or API
• [ ] Removes existing feature or API