refs https://github.com/TryGhost/Team/issues/1149
- uses `willTransition` action rather than `deactivate` hook because we also want to close the table when navigating to the theme demo child routes
refs https://github.com/TryGhost/Team/issues/1149
- added a `@data.onActivationSuccess` option to the upload-theme modal that if present is called when activation of a theme is completed as part of the upload process
- added a `startThemeUpload()` action to the `change-theme` controller so that we can pass in an `onActivationSuccess` which transitions to the `design.settings.index` screen
- removed unnecessary `@tracked` decorators on class properties that have `store.peekAll('theme')` assigned to them
refs https://github.com/TryGhost/Team/issues/1149
If you were part way scrolled through the themes list and you clicked the "Advanced" button, the installed themes list was displayed at the top of the scrollable element but the browser kept the scroll position so it looked like nothing happened.
- updated `toggleAdvanced()` action to scroll the main container to the top so that the installed themes list is immediately viewable when you use the button to open/navigate to it
refs https://github.com/TryGhost/Team/issues/1149
- added Casper to the hardcoded official themes list with a ref of `'default'` so that the install theme process knows to process it differently
- updated the install-theme modal
- removed the `willOverwriteDefault` getter because it's a path that can't be reached and is now handled differently
- changed `installThemeTask` to only perform an activation when a default theme is passed in
no issue
- added details to the `marketplaceThemes` array in the `change-theme` controller
- added theme images obtained from https://ghost.org/themes/
refs https://github.com/TryGhost/Team/issues/1130
- added new route for viewing themes so back/forward buttons can be used
- takes theme name as a parameter
- opens a fullscreen modal with an iframe containing the theme demo
- changed installable themes list to link to new route
- swapped `previewUrl` in theme data to point at the real demo rather than the ghost.org demo page
refs https://github.com/TryGhost/Team/issues/1130
- match latest design where the theme table is under an "advanced" toggle on the change-theme screen rather than a completely separate screen
refs https://github.com/TryGhost/Team/issues/1130
- copied theme upload modal to new modals system and refactored for Octane syntax
- updated to use `themeManagement` service rather than passed in actions so the modal-based process can be opened from any screen
- added default `beforeClose()` for the modal to the modals service so it won't close if an upload is in-progress (defaults were moved directly into the class so it had access to services)
- added `themeManagement.upload` action for triggering the upload modal and providing a central place for limit checks
- added upload-triggering buttons to change-theme and advanced design screens
refs https://github.com/TryGhost/Team/issues/1130
- added link to design sidebar
- dropped change-theme modal and associated route behaviour
- copied basic themes marketplace list into the change-theme controller/template
