Take into account scale actor while resizing the image in generic wxImageList

Too small image needs to be resized to the required physical size first
and next converted to wxBitmap with actual scale factor.

src/generic/imaglist.cpp

@@ -132,8 +132,9 @@ wxBitmap GetImageListBitmap(const wxBitmap& bitmap, bool useMask, const wxSize&
     {
 #if wxUSE_IMAGE
         wxImage img = bmp.ConvertToImage();
-        wxImage imgResized = img.Size(imgSize, wxPoint(0, 0), 0, 0, 0);
-        bmpResized = imgResized;
+        // We need image with new physical size
+        wxImage imgResized = img.Size(scaleFactor * imgSize, wxPoint(0, 0), 0, 0, 0);
+        bmpResized = wxBitmap(imgResized, -1, scaleFactor);
 #else
         bmpResized = bmp;
 #endif // wxUSE_IMAGE