Fix demo test build

Signed-off-by: falkTX <falktx@falktx.com>

tests/widgets/ExampleColorWidget.hpp

@@ -118,7 +118,7 @@ protected:
         bgSmall.draw(context);
     }
 
-    void onResize(const ResizeEvent& ev) override
+    void onResize(const Widget::ResizeEvent& ev) override
     {
         const uint width  = ev.size.getWidth();
         const uint height = ev.size.getHeight();

tests/widgets/ExampleRectanglesWidget.hpp

@@ -113,7 +113,7 @@ protected:
         }
     }
 
-    bool onMouse(const MouseEvent& ev) override
+    bool onMouse(const Widget::MouseEvent& ev) override
     {
         if (ev.button != 1 || ! ev.press)
             return false;

tests/widgets/ExampleShapesWidget.hpp

@@ -85,7 +85,7 @@ protected:
         cir.drawOutline(context, 2);
     }
 
-    void onResize(const ResizeEvent& ev) override
+    void onResize(const Widget::ResizeEvent& ev) override
     {
         const int width  = ev.size.getWidth();
         const int height = ev.size.getHeight();