Missing IFramePanel control link

Added IFramePanel control link.

Author: Gaurav8Bizportals

docs/documentation/docs/index.md

@@ -66,6 +66,7 @@ The following controls are currently available:
 - [GridLayout](./controls/GridLayout) (control that renders a responsive grid layout for your web parts)
 - [IconPicker](./controls/IconPicker) (control that allows to search and select an icon from office-ui-fabric icons)
 - [IFrameDialog](./controls/IFrameDialog) (renders a Dialog with an iframe as a content)
+- [IFramePanel](./controls/IFramePanel) (renders a Panel with an iframe as a content)
 - [ListItemPicker](./controls/ListItemPicker) (allows to select one or more items from a list)
 - [ListPicker](./controls/ListPicker) (allows to select one or multiple available lists/libraries of the current site)
 - [ListView](./controls/ListView) (List view control)