LibWeb: Adjust buttons computed display style

Author: https://github.com/lpas
Commit: f54793315c
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/6481
Reviewed-by: https://github.com/AtkinsSJ ✅

Libraries/LibWeb/HTML/HTMLButtonElement.h

@@ -31,6 +31,7 @@ public:
     virtual ~HTMLButtonElement() override;
 
     virtual void initialize(JS::Realm&) override;
+    virtual void adjust_computed_style(CSS::ComputedProperties&) override;
 
     enum class TypeAttributeState {
 #define __ENUMERATE_HTML_BUTTON_TYPE_ATTRIBUTE(_, state) state,