DocTypeGridEditorHelper - minor tidy-up

Removed the explicit references for `ApplicationContext.Current.Services`, as we already had a private static reference set on the class.

Author: leekelleher

src/Our.Umbraco.DocTypeGridEditor/Helpers/DocTypeGridEditorHelper.cs

@@ -48,7 +48,7 @@ private static IPublishedContent ConvertValue(string id, string contentTypeAlias
                     contentTypeAlias = Services.ContentTypeService.GetAliasByGuid(contentTypeGuid);
 
                 var publishedContentType = PublishedContentType.Get(PublishedItemType.Content, contentTypeAlias);
-                var contentType = ApplicationContext.Current.Services.ContentTypeService.GetContentType(contentTypeAlias);
+                var contentType = Services.ContentTypeService.GetContentType(contentTypeAlias);
                 var properties = new List<IPublishedProperty>();
 
                 // Convert all the properties
@@ -91,15 +91,14 @@ private static IPublishedContent ConvertValue(string id, string contentTypeAlias
                              */
                             prop2 = new Property(propType2, newValue);
                         }
-                        catch(Exception ex)
+                        catch (Exception ex)
                         {
                             LogHelper.Error<DocTypeGridEditorHelper>("[DocTypeGridEditor] Error creating Property object.", ex);
                         }
 
                         if (prop2 != null)
                         {
-                            var newValue2 = propEditor.ValueEditor.ConvertDbToString(prop2, propType2,
-                                ApplicationContext.Current.Services.DataTypeService);
+                            var newValue2 = propEditor.ValueEditor.ConvertDbToString(prop2, propType2, Services.DataTypeService);
 
                             properties.Add(new DetachedPublishedProperty(propType, newValue2));
                         }