The Next preview took the column's full width and the slide's aspect for its height, so a
portrait slide (up to 1:56) drew a white slab many times the window's height over the notes,
which were pushed below the window. It is now fitted into the top 60% of the column; 16:9
slides keep the full width as before.
Co-authored-by: Cursor <cursoragent@cursor.com>
Slide show, transition and morph frames, thumbnails, master-view canvas, master/layout
thumbnails, Design Ideas previews, presenter-view preview and video frames all upload through
textures::upload/replace, which shrinks a picture past max_texture_side (egui panicked on one).
Render sizes are fitted to the limit first, so a big screen, extreme DPI or a 1:56 slide
doesn't render a picture the GPU can't hold. The master canvas is cropped like the slide canvas.
Co-authored-by: Cursor <cursoragent@cursor.com>
Nikita RakitinandCursor