Consolidate localization behavior and init to a coreLocalizer function and singleton
Explicitly support `en-US` locale
Rename coreData to coreFileFetcher and export a singleton rather than using a property of coreContext
Add `apiConnections` property of coreContext to simplify adding a source switcher
Replace some init functions with re-callable, promise-supporting `ensureLoaded` functions
Make coreContext itself load the UI if a container has been specified at init time
Fix code tests
`postNoteUpdate` can hangle status changes and comment additions
(I named it that to be like `putChangeset`)
Also renamed `user` to `loadUser` to be consistent with other calls
- I made the buttons work like GitHub comment-on-issue buttons
before typing: "Close Note" / "Comment" (disabled)
after typing: "Close and Comment" / "Comment" (enabled)
- I removed a bunch of the event dispatches. These are useful for sending
events to listeners/observers outside of the module. In this case I think
we can handle most of the things from within the uiNoteEditor. We can still
dispatch an 'update' event so that modeSelectNote can reselect and redraw
the note after some change happens to it.
TODO - make the buttons work / check the OSM API stuff.
