Clean project structure.

src/ui/ui_controls/ButtonGroup.h

@@ -0,0 +1,23 @@
+#pragma once
+
+#include "Widget.h"
+
+class ButtonGroup : public Widget
+{
+public:
+
+    enum class Orientation
+    {
+        HORIZONTAL,
+        VERTICAL
+    };
+
+    ButtonGroup();
+
+    ~ButtonGroup();
+
+    static std::unique_ptr<ButtonGroup> Create();
+
+private:
+    bool mExclusiveActivation{true};
+};