fix: add more explanations in BoF requests

[evyncke]

Fixing issue #3517

[rjsparks]

Per offline discussion with éric, he wants to make some changes before this is merged.

[rjsparks]

Note also https://github.com/ietf-tools/datatracker/runs/5617870056?check_suite_focus=true#step:6:48

[codecov]

Codecov Report

Merging #3706 (0daf6cf) into feat/bs5 (8bd4851) will increase coverage by 0.00%.
The diff coverage is 100.00%.

❗ Current head 0daf6cf differs from pull request most recent head 8142068. Consider uploading reports for the commit 8142068 to get more accurate results

@@            Coverage Diff            @@
##           feat/bs5    #3706   +/-   ##
=========================================
  Coverage     87.97%   87.97%           
=========================================
  Files           296      297    +1     
  Lines         38795    38804    +9     
=========================================
+ Hits          34130    34139    +9     
  Misses         4665     4665           

Impacted Files	Coverage Δ
ietf/meeting/models.py	86.08% <ø> (ø)
ietf/meeting/utils.py	90.27% <ø> (-0.29%)	⬇️
ietf/meeting/templatetags/editor_tags.py	100.00% <100.00%> (ø)
ietf/meeting/views.py	90.73% <100.00%> (+0.02%)	⬆️
ietf/submit/forms.py	82.88% <0.00%> (ø)

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