Cropsizes config and upload compatible

Refactors imagecropper and fileupload to use the samen metadata setting
extensions

src/Umbraco.Web/Models/ImageCropData.cs

@@ -43,7 +43,8 @@ namespace Umbraco.Web.Models
             {
                 if (HasFocalPoint())
                 {
-
+                    sb.Append("?center=" + FocalPoint.Top + "," + FocalPoint.Left);
+                    sb.Append("&mode=crop");
                 }
                 else
                 {
@@ -51,7 +52,6 @@ namespace Umbraco.Web.Models
                     sb.Append("&mode=crop");
                 }
 
-
             }
 
             sb.Append("&width=").Append(crop.Width);