feat(tests): show page source if element cannot be found

[nijel]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 66.66667% with 3 lines in your changes missing coverage. Please review.

Project coverage is 91.01%. Comparing base (688bf58) to head (8fce330).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
weblate/trans/tests/test_selenium.py	66.66%	3 Missing ⚠️

❌ Your patch status has failed because the patch coverage (66.66%) is below the target coverage (100.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #14035      +/-   ##
==========================================
- Coverage   91.01%   91.01%   -0.01%     
==========================================
  Files         608      608              
  Lines       63635    63639       +4     
  Branches     6584     6584              
==========================================
+ Hits        57918    57919       +1     
- Misses       4023     4026       +3     
  Partials     1694     1694              

Files with missing lines	Coverage Δ
weblate/trans/tests/test_selenium.py	95.73% <66.66%> (-0.36%)	⬇️