Change default max_scroll_height of egui::Table to f32::INFINITY (#4817)

egui::Table has a weirdly specific default max_scroll_height set to 800.0. This means that even with vscroll(true) and auto_shrink([_, false]), the table will not expend to the full available height. This PR changes this value to f32::INFINITY. This makes it consistent with the corresponding default value of ScrollArea::max_size.y, which is where that max_scroll_height ends up being used.