add refreshtoggle to listpicker

Author: russgove

docs/documentation/docs/controls/ListPicker.md

@@ -65,6 +65,8 @@ The `ListPicker` control can be configured with the following properties:
 | onSelectionChanged | (newValue: string OR string[]): void | no | Callback function when the selected option changes. |
 | webAbsoulteUrl | string | no | Absolute Web Url of target site (user requires permissions) |
 | contentTypeId | string | no | The Id if a content type which must be present in a list in order for the list to appear in the picker.|
+| refreshToggle | boolean | no | If present can be used to force the control to refresh the list of lists by toggling its value|
+
 Enum `LibsOrderBy`
 
 | Value |

package-lock.json

@@ -64,6 +64,10 @@ export interface IListPickerProps {
   * Content type id which, if present, must be on the list
   */
   contentTypeId?: string;
+    /**
+  * if present can be used to force the control to refresh the list of lists by toggling its value
+  */
+     refreshToggle?: boolean;
 }
 
 export interface IListPickerState {

src/controls/listPicker/IListPicker.ts

@@ -51,7 +51,8 @@ export class ListPicker extends React.Component<IListPickerProps, IListPickerSta
       prevProps.baseTemplate !== this.props.baseTemplate ||
       prevProps.includeHidden !== this.props.includeHidden ||
       prevProps.orderBy !== this.props.orderBy ||
-      prevProps.webAbsoluteUrl !== this.props.webAbsoluteUrl
+      prevProps.webAbsoluteUrl !== this.props.webAbsoluteUrl||
+      prevProps.refreshToggle !== this.props.refreshToggle
     ) {
       this.loadLists();
     }