refs https://github.com/TryGhost/Ghost/issues/5071
Upgrade messages are now shown on the About screen rather than as alerts. Notifications that are marked as `top` or `custom` are still shown as alerts to allow for certain upgrade messages to be given more visibility.
- remove old `upgrade-notification` service
- update the `upgrade-status` service:
- add a `message` property that contains an upgrade notification if any exists
- add a `handleUpgradeNotification` method that accepts a Notification model instance and extracts the `notification.message` property into a html safe string for use in templates
- when loading server notifications during app boot, pass notifications that aren't marked as `top` or `custom` to the new `handleUpgradeNotification` method
- update the `about.hbs` template to pull the upgrade message from the `upgradeStatus` service
refs TryGhost/Ghost#7427
Removes `-contributors.hbs` and `public/assets/img/contributors` from `.gitignore`.
Removes `buildAboutPage` from `grunt init` task.
Updates `contributors.hbs` and adds images for each contributor.
Changes the `max-width` of `.gh-credits` wrapper to be 700px instead of 650px, so we'll fit them all in two rows.
- Modal button position tweaked, removed extraneous margin
- Fix user profile full name field and mobile profile-picture
- Added chevron to tag settings men, corrected chevron colour
- Fixed regression in delete-tag button caused by removing flexbox from buttons
- Fixed regression in button positioning on about-ghost page caused by removing flexbox from buttons
See #5652
