closes https://github.com/TryGhost/Ghost/issues/8249
- replaces the old split-button publish/schedule/update button with a less confusing menu system
- adds a `{{gh-date-time-picker}}` component that contains a datepicker with separate time input
- replaces the date text input in the post settings menu with `{{gh-date-time-picker}}`
- disabled when post is scheduled, only way to update a scheduled time is via the publish menu
- validates date is in the past when draft/published so there's no confusion with scheduling
- displays saving status in top-left of editor screen
- refactor editor (auto)saving processes to use ember-concurrency
Other minor changes:
- adds `post.publishedAtBlog{TZ,Date,Time}` properties to Post model to allow working with `publishedAt` datetime in the selected blog timezone rather than UTC
- adds a `beforeSave` hook to `validation-engine` that is called after successful validation and before the Ember Data save call is made
- adds validation of `publishedAtBlog{Date,Time}` to post validator
- prevent gh-task-button showing last task state on first render
- fixes bug where clicking into and out of the published date input in the PSM without making any changes saves a published date for draft posts
refs TryGhost/Ghost#7860
- removes post type filter links
- adds dropdown filters for post type, author, and tag
- replaces custom refresh on query params change with Ember's standard `refreshModel` config
no issue
- drop `jshint`, `jscs`, and `ember-suave` dependencies
- remove `grunt` related linting dependencies and tasks
- remove linting build from Travis so that linting can be performed as part of the normal test suite (refs TryGhost/Ghost#7427)
- add `ember-cli-eslint` and `eslint-plugin-ember-suave` dependencies
- configure `eslint` to match our previous coding style
- update config to run eslint tests as part of the normal test run
- add `npm run lint` command to only run linter tests
