The pointer events use a different mechanism for counting clicks that doesn't
work when the tests are run in a real browser like Chrome. This change forces
iD to always use mouse events during testing, even in a real browser.
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
(closes#6028) (I hope?)
Because this click may trigger a blur event,
and the blur event may trigger a tag change,
and we really want that tag change to go to the already selected entity
and not the one that we are about to select with the click #6028, #5878
(Be very careful entering modeSelect anywhere that might also blur a field!)
