Followup to ef0d8151d. Add symlinks from app/components/**/*.js to
app/javascript/src/javascripts/*.js so you can still see a component's
Javascript inside the component.
Move Javascript files from app/components/**/*.js back to app/javascript/src/javascripts/*.js.
This way Javascript files are in one place, which simplifies import paths and makes it
easier to see all Javascript at once.
Possible fix for #4675. This is still wonky; tapping the menu icon now
opens the menu, but doesn't close it. You have to tap outside the menu
to hide it.
* Add comment scores.
* Rework voting buttons so that you can click the upvote/downvote
buttons to toggle votes.
* Hide the edit, delete, undelete, and report buttons behind a popup menu.
* Show the upvote/downvote/reply buttons to logged out users. Redirect
them to the login page instead.
