Fixes issue 7933

src/Umbraco.Web.UI.Client/src/views/propertyeditors/grid/editors/media.controller.js

@@ -49,6 +49,11 @@ angular.module("umbraco")
                     }
                 }
 
+                // set default size if no crop present (moved from the view)
+                if (url.indexOf('?') == -1)
+                {
+                    url += "?width=800&upscale=false"
+                }
                 $scope.url = url;
             }
         };

src/Umbraco.Web.UI.Client/src/views/propertyeditors/grid/editors/media.html

@@ -9,7 +9,7 @@
 		<img
 			ng-if="url"
 			ng-click="setImage()"
-			ng-src="{{url}}?width=800&upscale=false"
+			ng-src="{{url}}"
 			class="fullSizeImage" />
         <input type="text" class="caption" ng-model="control.value.caption" localize="placeholder" placeholder="@grid_placeholderImageCaption" />
  	</div>