Allow panel on FilePicker to be open after first load

Author: joelfmrodrigues

src/controls/filePicker/FilePicker.tsx

@@ -115,6 +115,20 @@ export class FilePicker extends React.Component<
     });
   }
 
+  /**
+   * componentWillReceiveProps lifecycle hook
+   *
+   * @param nextProps
+   */
+   public componentWillReceiveProps(nextProps: IFilePickerProps): void {
+    if (nextProps.isPanelOpen || nextProps.isPanelOpen !== this.props.isPanelOpen) {
+      this.setState({
+        panelOpen: nextProps.isPanelOpen
+      });
+
+    }
+  }
+
   public render(): JSX.Element {
     // If no acceptable file type was passed, and we're expecting images, set the default image filter
     const accepts: string[] = this.props.accepts;
@@ -451,6 +465,6 @@ export class FilePicker extends React.Component<
     if (!props.hideLocalMultipleUploadTab) {
       return "keyMultipleUpload";
     }
-    
+
   }
 }