Sanity Studio v5.27.0: Improvements to Portable Text editor image preview and toolbar menu rendering

This release improves image preview display in the Portable Text editor and fixes toolbar menu rendering issues.

🐛 Notable bugfixes and improvements

Improves Portable Text editor block image previews: images are now displayed in the correct aspect ratio, preventing cropping and zooming.

Fixes an issue preventing Portable Text toolbar menus from rendering correctly.

Fixed an issue where the comments field wrapper displayed an empty element when the field component was hidden.