🐛 Fixed incorrect modal and theme preview positioning
🐛 Fixed incorrect modal and theme preview positioning

closes https://github.com/TryGhost/Ghost/issues/14415

- after switching to a proper package version of our `ember-promise-modals` fork the addon's CSS was injected into the vendor file causing conflicts with our own modal styling
- added `transform: none` style override on `.epm-modal` so we're not fighting the addon's default `translate(0, -30vh) scale(1.1);` transform

TryGhost/Ghost-Admin,TryGhost/Ghost-Admin