docs(treelist): Add missing EditorType column parameter

Author: dimodi

components/treelist/columns/bound.md

@@ -143,6 +143,7 @@ You can use the following properties on bound columns:
 ### Data Operations
 
 * `Editable` - (defaults to `true`) - you can set this property to `true` or `false` to allow or prevent [editing]({%slug treelist-overview%}#editing) of this field. Defaults to `true`. To edit data, you also need a [CommandColumn]({%slug treelist-columns-command%}).
+* `EditorType` - set the [editor component for `string` or `DateTime` columns]({%slug treelist-editing-overview%}#customize-the-editor-fields) when an [`EditorTemplate`]({%slug treelist-templates-editor%}) is not used.
 * `Filterable` - (defaults to `true`) - you can set this to `false` so a [filterable]({%slug treelist-filtering%}) treelist will not let the user filter that particular column.
 * `FilterEditorType` - (defaults to `TreeListFilterEditorType.DatePicker`) - determines if the default filtering component of a `DateTime` column will be a DatePicker or a DateTimePicker.
 * `FilterEditorFormat` - sets the `Format` of the filtering component as a `string`. Works for DateTime and numeric columns. Do not use a placeholder (e.g. set `"D"`, not `"{0:D}"`).