* clean up title model
* update title style
* organize issue SC method
* remove background colors from styled text in issues
* collection view bg white
* remove card inset and clean up snap superview code
* clean up label design
* thread is root and change base font size
* remove borders on comment cells
* adjust collapse design
* adjust comment line spacing and make non-root body smaller
* refactor detail view
* viewer header background color
* more buttons in reaction cell
* vertical spacers working
* design basically finished;
* scroll to bottom accounts for inset
* PR review background color white
* fixup PR review comments
* spacing on merge and review
* readme background white
* rename to just "spacer"
* horizontal spacing
* fix tests
* replace old markdown callsites
* unit tests working
* remove unused parsing
* final removal of old parsing, build and tests succeed
* remove dependency
* capture readme ref branch
* add cmark lib, build succeeds
* building and running (with dupe asserts)
* list newlines, quote styles
* tables working in cmark
* fix table bg color math and code bg color
* code block highlighting only when theres a language
* share code block logic
* mentions need @
* update cmark lib
* shortlinks
* detect issue shortlinks
* simplify and correct shortlinks
* remove html comments
* tests passing
* milestones refactored with styled text
* reference refactored
* refactor commit references
* fix styled text bug
* request event refactored
* refactor titles
* warm caches for bg-gen models
* delete old text cell
* move shortlinks into MMMarkdown
* almost there
* build green
* running and trimming whitespaces
* styled text working
* fix tests
* tests passing
* add assets
* put marker for checked and unchecked
* attachment working
* export smaller assets
* use lighter blue for checked
* thread can-update, undo accident
* nudge down checkmark attachment
* add tests
