LibWeb: Include scrollable overflow in paint tree dumps

Author: https://github.com/awesomekling
Commit: 571c05bb47
Pull-request: https://github.com/SerenityOS/serenity/pull/19196

Userland/Libraries/LibWeb/Dump.cpp

@@ -814,6 +814,10 @@ void dump_tree(StringBuilder& builder, Painting::Paintable const& paintable, boo
     if (paintable.layout_node().is_box()) {
         auto const& paintable_box = static_cast<Painting::PaintableBox const&>(paintable);
         builder.appendff(" {}", paintable_box.absolute_border_box_rect());
+
+        if (paintable_box.has_overflow()) {
+            builder.appendff(" overflow: {}", paintable_box.scrollable_overflow_rect().value());
+        }
     }
     builder.append("\n"sv);
     for (auto const* child = paintable.first_child(); child; child = child->next_sibling()) {