Change default max_scroll_height of egui::Table to f32::INFINITY (

emilk#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.

crates/egui_extras/src/table.rs

@@ -185,7 +185,7 @@ impl Default for TableScrollOptions {
             scroll_to_row: None,
             scroll_offset_y: None,
             min_scrolled_height: 200.0,
-            max_scroll_height: 800.0,
+            max_scroll_height: f32::INFINITY,
             auto_shrink: Vec2b::TRUE,
             scroll_bar_visibility: ScrollBarVisibility::VisibleWhenNeeded,
         }