improve accessibility of new note page

[Tlazypanda]

Fixes #8053
Improved accessibility of new note route by adding form labels for missing form labels.

• PR is descriptively titled 📑 and links the original issue above 🔗
• tests pass -- look for a green checkbox ✔️ a few minutes after opening your PR -- or run tests locally with rake test
• code is in uniquely-named feature branch and has no merge conflicts 📁
• screenshots/GIFs are attached 📎 in case of UI updation
• ask @publiclab/reviewers for help, in a comment below

Screenshots

Before

After

Thanks!

[codecov]

Codecov Report

Merging #8054 into master will decrease coverage by 4.86%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #8054      +/-   ##
==========================================
- Coverage   82.62%   77.75%   -4.87%     
==========================================
  Files          99       99              
  Lines        5737     5840     +103     
==========================================
- Hits         4740     4541     -199     
- Misses        997     1299     +302     

Impacted Files	Coverage Δ
app/controllers/openid_controller.rb	0.00% <0.00%> (-53.85%)	⬇️
app/controllers/comment_controller.rb	72.34% <0.00%> (-14.90%)	⬇️
app/controllers/users_controller.rb	71.18% <0.00%> (-11.12%)	⬇️
app/models/comment.rb	68.96% <0.00%> (-7.94%)	⬇️
app/controllers/application_controller.rb	84.61% <0.00%> (-7.70%)	⬇️
app/controllers/home_controller.rb	91.93% <0.00%> (-6.46%)	⬇️
app/controllers/admin_controller.rb	75.94% <0.00%> (-5.91%)	⬇️
app/services/execute_search.rb	88.88% <0.00%> (-5.56%)	⬇️
app/api/srch/search.rb	66.24% <0.00%> (-3.83%)	⬇️
app/models/spamaway.rb	92.30% <0.00%> (-2.57%)	⬇️
... and 4 more

[jywarren]

Yay!!!!