[Stats Refresh] Period Posts and Pages card: update icon based on type

[ScoutHarris]

With #10885, the Posts and Pages card was added. However, the backend does not distinguish between post or page. Therefore, the icon displayed cannot be set according to type.

Currently, all data rows display the post icon. When the backend is updated to provide the type, the icon needs to be updated to use the type and display the correct icon.

Example of current display (all using post icon):

cc @jklausa

[ScoutHarris]

Will be fixed with #11342.