Sets whether the filter pane is shown on a page by default.
Yes to show the filter pane; otherwise, No. The default value is Yes.
Using customization, a user can override the ShowFilter property setting to show or hide the filter except when the page is displayed in a part of another page, such as a FastTab or FactBox. When the page is displayed in a page part, the ShowFilter property permanently hides or shows the filter pane.