no issue
Ember is migrating to `<AngleBracketSyntax />` for component invocation, see https://github.com/emberjs/rfcs/blob/master/text/0311-angle-bracket-invocation.md
We were in a half-way situation where some templates used angle bracket syntax in some places, this PR updates templates to use the syntax everywhere.
This simplifies the rules for what template code is referring to...
`<Component>` = a component
`{{helper}}` = a helper (or locally assigned handlebars variable)
`{{this.foo}}` = data on the template backing context (a component/controller)
`{{@foo}}` = a named argument passed into the component that the component backing class has not modified (note: this commit does not introduce any named arguments)
- ran codemod https://github.com/ember-codemods/ember-angle-brackets-codemod on the following directories:
- `app/templates`
- `lib/koenig-editor/addon/templates`
- removed positional params from components as angle bracket syntax does not support them
- `gh-feature-flag`
- `gh-tour-item`
- `gh-cm-editor`
- `gh-fullscreen-modal`
- `gh-task-button`
- updates some code that was missed in 3c851293c1 to use explicit this
closes https://github.com/TryGhost/Ghost/issues/9394
- add `application-error.hbs` template so that we show an error screen for errors during app boot
- track the application route loading state so that we can fall back to the default error handling for errors that usually only show an alert
