LibGUI: Allow overriding the padding inside a TabWidget

Libraries/LibGUI/TabWidget.cpp

@@ -156,7 +156,8 @@ void TabWidget::paint_event(PaintEvent& event)
         padding_rect.shrink(2, 2);
     }
 
-    Gfx::StylePainter::paint_frame(painter, container_rect, palette(), Gfx::FrameShape::Container, Gfx::FrameShadow::Raised, 2);
+    if (container_padding() > 0)
+        Gfx::StylePainter::paint_frame(painter, container_rect, palette(), Gfx::FrameShape::Container, Gfx::FrameShadow::Raised, 2);
 
     for (size_t i = 0; i < m_tabs.size(); ++i) {
         if (m_tabs[i].widget == m_active_widget)

Libraries/LibGUI/TabWidget.h

@@ -50,7 +50,9 @@ public:
     void set_active_widget(Widget*);
 
     int bar_height() const { return 21; }
-    int container_padding() const { return 2; }
+
+    int container_padding() const { return m_container_padding; }
+    void set_container_padding(int padding) { m_container_padding = padding; }
 
     void add_widget(const StringView&, Widget&);
     void remove_widget(Widget&);
@@ -100,6 +102,7 @@ private:
     Vector<TabData> m_tabs;
     TabPosition m_tab_position { TabPosition::Top };
     int m_hovered_tab_index { -1 };
+    int m_container_padding { 2 };
 };
 
 }