fix: Link chat log button to chatlog SessionPresentation if available

[jennifer-richards]

Fixes #5028

[codecov]

Codecov Report

Merging #5131 (14dd95f) into main (e280b25) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #5131   +/-   ##
=======================================
  Coverage   88.50%   88.50%           
=======================================
  Files         295      295           
  Lines       40015    40018    +3     
=======================================
+ Hits        35415    35419    +4     
+ Misses       4600     4599    -1     

Impacted Files	Coverage Δ
ietf/ietfauth/utils.py	92.85% <ø> (ø)
ietf/meeting/models.py	86.07% <100.00%> (+0.16%)	⬆️
ietf/secr/sreq/views.py	91.16% <100.00%> (ø)
ietf/utils/text.py	85.97% <0.00%> (-0.61%)	⬇️
ietf/nomcom/utils.py	91.30% <0.00%> (-0.25%)	⬇️
ietf/doc/views_search.py	89.02% <0.00%> (+0.20%)	⬆️
ietf/utils/pipe.py	86.95% <0.00%> (+4.34%)	⬆️

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