* Adding ytpl and ytsr as externals in web.config
This should get rid of those two warnings that were
showing up on web builds
* Reducing discrepancies between dev and prod in web builds
* Removing a line which would prevent hot reloading
`this.locales` is retained between hot reloads, so it shouldn't
be set to `null`.
* Adding a new flag to the dev runner
Adding a new command: `run dev:web`
* Running `loadLocale` in development web builds
* Adding a line back which was removed
* Removing a line which was added