refs https://github.com/TryGhost/Team/issues/1149
Ghost allows different themes to have the same `name` value in `package.json` but gives them a custom name based on the zip file used to upload it. The custom theme settings service however was always using the package.json name meaning that when syncing a theme with a duplicate name it was overwriting the settings for all other themes.
- bumped `@tryghost/custom-theme-settings-service` which changes the `.activateTheme()` signature to accept a theme name as the first argument
- updated our calls to `.activateTheme()` to pass Ghost's known theme name as the first argument so we're always syncing with the correct `theme` field value in the `custom_theme_settings` table
59a6f040d2