Move windows to uptr. Add simple text editing.

src/ui_elements/widgets/Button.h

@@ -5,20 +5,20 @@
 class Button : public Widget
 {
 private:
-	std::string mLabel;
+    std::string mLabel;
 
 public:
-	Button();
+    Button();
 
-	void SetLabel(const std::string& text);
+    static std::unique_ptr<Button> Create();
 
-	static std::shared_ptr<Button> Create();
+    void SetLabel(const std::string& text);
 
-	void OnPaintEvent(PaintEventPtr event);
+    void OnPaintEvent(const PaintEvent* event) override;
 
 protected:
 
-	void OnMyMouseEvent(MouseEventPtr event);
+    void OnMyMouseEvent(const MouseEvent* event) override;
 };
 
-using ButtonPtr = std::shared_ptr<Button>;
+using ButtonUPtr = std::unique_ptr<Button>;