General
- Added an image loading animation to the viewer
- Added image dimensions to the viewer when known, to prevent the page from jumping when they start loading
- Currently the only known dimensions are for image embeds that were not imported from legacy archives
- Fixed broken attachment downloads when multiple attachments have the same URL
- Fixed allowing negative numbers in attachment size filters
- Fixed error with very large numbers in attachment size filters
- Fixed "Remove Messages Matching Filters" not working when the filter includes all messages
- Fixed not formatting single underscores as italics in the viewer
- Improved error handling and reporting when extracting message data