Sharper thumbnails and more reliable drawing uploads

This release improves how location drawings and thumbnails look and behave across the app.

Improved

• Uploading location drawings now shows overall progress for the whole batch, automatically retries files that briefly fail, and offers a "Retry failed files" button to re-send only the ones that didn't go through.
• Confirming a drawing now updates the location's thumbnail with the current map view.

Fixed

• Restored location thumbnails that could fail to load in some configurations.
• Thumbnails in list views now crop cleanly instead of appearing stretched.