feat: add help dialogs to all pages

[srabraham]

these can be brought up with the "?" key. A bunch of pages already had these dialogs, but I wanted to be consistent and have all of them have dialogs too, even if they'd be empty.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 85.71429% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 83.59%. Comparing base (5b3397a) to head (1ba9235).

Files with missing lines	Patch %	Lines
web/typescript/ims.ts	85.71%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #841      +/-   ##
==========================================
+ Coverage   83.34%   83.59%   +0.25%     
==========================================
  Files          85       85              
  Lines       11040    11004      -36     
  Branches     1179     1169      -10     
==========================================
- Hits         9201     9199       -2     
+ Misses       1361     1332      -29     
+ Partials      478      473       -5     

Flag	Coverage Δ
go	89.71% <ø> (-0.02%)	⬇️
typescript	77.08% <85.71%> (+0.49%)	⬆️

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