PixelPaint: Increase default size of new images from 1x1 to 480x360

Userland/Applications/PixelPaint/CreateNewImageDialog.cpp

@@ -66,6 +66,9 @@ CreateNewImageDialog::CreateNewImageDialog(GUI::Window* parent_window)
 
     width_spinbox.set_range(1, 16384);
     height_spinbox.set_range(1, 16384);
+
+    width_spinbox.set_value(480);
+    height_spinbox.set_value(360);
 }
 
 }