no issue
- upgrade `ember-ajax` to 3.0.0
- `ember-ajax` [now passes the payload through directly](https://github.com/ember-cli/ember-ajax/releases/tag/v3.0.0) rather than trying to normalize it so all our error handling needed to be updated
closes https://github.com/TryGhost/Ghost/issues/6458
- swap `ember-sortable` for `ember-drag-drop` in navigation UI
- extract PSM tag input into new `{{gh-psm-tags-input}}`
- add new `{{gh-token-input}}` that wraps `ember-power-select` and `ember-drag-drop` to replicate the previous selectize based tags input
- enhance `{{gh-psm-tags-input}}` behaviour to highlight selected primary tag and show "primary/internal" in selected tag titles
- 🔥 remove `selectize`
- 🔥 remove `jquery-ui`
- 🔥 remove unused `{{gh-navigation}}` component
no issue
- ember/ember-data/ember-cli@2.16
- bump all outdated dependencies that do not require additional work or more extensive tests
- bump sub-dependencies in yarn.lock
- use `broccoli-uglify-sourcemap` (same dep as already used in `ember-cli-uglify`) instead of a separate `broccoli-uglify-js` package for building production codemirror assets
- add `/concat-stats-for` to `.gitignore` so that filesize stats from `CONCAT_STATS=true ember build` don't end up in the repo
closes https://github.com/TryGhost/Ghost/issues/8958
- `markdown-it-named-headers` pulled in `String.js` despite it not being used which added a lot of String.prototype extensions and caused Ember deprecation notices
- moves the short `markdown-it-named-headers` functionality directly into our app code without using `String.js`
refs https://github.com/TryGhost/Ghost/issues/8958
- Ghost OAuth isn't coming back, time for the code to disappear and simply all the things
- fixes the `Usage of router is deprecated` notices that flood the console/test logs when testing
