Add handle_paste for copy

[cyrillkuettel]

Please fill in the commit message below and work through the checklist. You can delete parts that are not needed, e.g. the optional description, the link to a ticket or irrelevant options of the checklist.

Commit message

Town6: Allow to copy newsletter.

TYPE: Feature
LINK: OGC-1663

Checklist

• I have performed a self-review of my code
• I have tested my code thoroughly by hand
• I have added tests for my changes/features

[linear]

OGC-1663 Newsletter Kopieren

[codecov]

Codecov Report

❌ Patch coverage is 86.04651% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 82.72%. Comparing base (6d76122) to head (a19fcb0).
⚠️ Report is 27 commits behind head on master.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
src/onegov/org/views/newsletter.py	83.33%	4 Missing ⚠️
src/onegov/org/layout.py	92.85%	1 Missing ⚠️
src/onegov/town6/views/newsletter.py	66.66%	1 Missing ⚠️

Additional details and impacted files

Files with missing lines	Coverage Δ
src/onegov/reservation/models/custom_allocation.py	92.30% <100.00%> (ø)
...rc/onegov/reservation/models/custom_reservation.py	98.41% <100.00%> (ø)
src/onegov/org/layout.py	92.03% <92.85%> (-0.01%)	⬇️
src/onegov/town6/views/newsletter.py	97.95% <66.66%> (-2.05%)	⬇️
src/onegov/org/views/newsletter.py	94.78% <83.33%> (-0.98%)	⬇️

... and 112 files with indirect coverage changes

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 6d76122...a19fcb0. Read the comment docs.

🚀 New features to boost your workflow:

• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.