Various ember addons produced deprecation messages, some in the browser
console and some in terminal. Upgrading and replacing some of these has
reduced this.
Upgrades:
- ember-collection
- ember-computed-style
Replacements:
- ember-pluralize replaced with ember-inflector
- ember-cli-format-number replaced with custom helper using standard
`toLocaleString`
Removing ember-cli-format-number also meant some further changes related
to decimal places in the tomography graph, done using `toFixed`
The ExternalSources background-images have also now been escaped
correctly preventing in-development `console` warnings.
The only deprecation warnings are now from ember-block-slots, only in
terminal, making for a better development experience overall, especially now we
have an empty browser console
Also adds a `callIfType` 'helper util' which is a util specifically for helpers (it conforms to a helper argument signature) to be expanded upon later.
