Rework outbound links and file downloads

[RobertJoonas]

Changes

• Refactoring
  • Handlebars helper function to inject code for multiple script extensions at the same time
  • Extracted several functions and improved readability
• Made the script not prevent default if it has been prevented by an external script (fixes outbound-links script causes media lightboxes to open in new tab #1941)
• Used callbacks instead of waiting 150ms for the event request to be sent
• Disallowed sending two events at the same time by only having one click handler
  • If using script.file-downloads.outbound-links.js and clicking an outbound download link, only outbound link click event is sent

Tests

• Automated tests have been added

Changelog

• Entry has been added to changelog

Documentation

• Docs have been updated

Dark mode

• This PR does not change the UI

[bundlemon]

BundleMon

Unchanged files (7)

Status	Path	Size	Limits
✅	static/css/app.css	515.19KB	-
✅	static/js/dashboard.js	295.62KB	-
✅	static/js/app.js	12.13KB	-
✅	static/js/embed.host.js	5.58KB	-
✅	static/js/embed.content.js	5.06KB	-
✅	tracker/js/plausible.js	748B	-
✅	static/js/applyTheme.js	314B	-

No change in files bundle size

Final result: ✅

View report in BundleMon website ➡️

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Current branch size history | Target branch size history

[ukutaht]

Reviewing this commit-by-commit was a pleasure, good job @RobertJoonas!

The only change I would request is removing the typeof check and doing it with handlebars instead.

[vinibrsl]

Nice work!