Userland: Specify margins and spacing in the GUI::Layout constructor

Author: https://github.com/AtkinsSJ
Commit: 77ad0fdb07
Pull-request: https://github.com/SerenityOS/serenity/pull/17495
Reviewed-by: https://github.com/awesomekling ✅

Userland/Applications/SystemMonitor/MemoryStatsWidget.cpp

@@ -43,9 +43,7 @@ MemoryStatsWidget::MemoryStatsWidget(GraphWidget* graph)
 
     set_fixed_height(110);
 
-    set_layout<GUI::VerticalBoxLayout>();
-    layout()->set_margins({ 8, 0, 0 });
-    layout()->set_spacing(3);
+    set_layout<GUI::VerticalBoxLayout>(GUI::Margins { 8, 0, 0 }, 3);
 
     auto build_widgets_for_label = [this](DeprecatedString const& description) -> RefPtr<GUI::Label> {
         auto& container = add<GUI::Widget>();