Handle image-only PDF exports

[calixteman]

No description provided.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.06%. Comparing base (5f181fd) to head (e2df5f4).

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #21717      +/-   ##
==========================================
+ Coverage   90.03%   90.06%   +0.03%     
==========================================
  Files         264      264              
  Lines       66939    66941       +2     
==========================================
+ Hits        60267    60290      +23     
+ Misses       6672     6651      -21     

Flag	Coverage Δ
browsertest	66.48% <80.00%> (-0.03%)	⬇️
fonttest	9.03% <ø> (ø)
integrationtest	69.36% <80.00%> (+0.01%)	⬆️
unittest	57.99% <100.00%> (+0.01%)	⬆️
unittestcli	56.72% <100.00%> (+0.03%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[timvandermeij]

Looks good; thanks!