This PR looks more substantial than it really is. The key changes in UX are:
Add buttons for Edit custom.css and Customize config.edn to the Settings modal.
Consolidate the Customize Shortcuts settings tab with the General tab.
(Reasoning: Since the former only had one item, it didn't warrant a whole separate tab.)
Beyond that, all of the other changes are small refactors (e.g. extracting repetitive code into reusable functions, fixing inconsistent whitespace) or tiny tweaks to copy (i.e. making text more concise / easier to read on the page).
- Visual polish for the settings page, keyboard shortcuts page, and outdenting tooltip
- Tweak copy throughout the app to make it a little simpler
- Add the ability to fetch the name of the meta key (i.e. Cmd or Ctrl) so it can be displayed to the user
- Make it possible to Cancel out of editing a keyboard shortcut, rather than the only option being to Save
