Quality should be copied.

Former-commit-id: e30a7b839d512f4a5faa85d16b23d421f2325e4c
Former-commit-id: a49e33c994d79bf4092788ef3027c1f47c2f66c4
Former-commit-id: 15bc1d0c90ebca357322e1ba10c21c3830a8e4ae

src/ImageProcessorCore/Image.cs

@@ -73,6 +73,7 @@ namespace ImageProcessorCore
                 }
             }
 
+            this.Quality = other.Quality;
             this.RepeatCount = other.RepeatCount;
             this.HorizontalResolution = other.HorizontalResolution;
             this.VerticalResolution = other.VerticalResolution;

src/ImageProcessorCore/ImageExtensions.cs

@@ -135,6 +135,7 @@ namespace ImageProcessorCore
                 {
                     // Several properties require copying
                     // TODO: Check why we need to set these?
+                    Quality = source.Quality,
                     HorizontalResolution = source.HorizontalResolution,
                     VerticalResolution = source.VerticalResolution,
                     CurrentImageFormat = source.CurrentImageFormat,