When a ContentPane is unpinned and displayed within the UnpinnedTabFlyout, the flyout will only remain open as long as the pane has keyboard focus or the mouse is over the flyout or the PaneTabItem associated with the pane in the UnpinnedTabArea. This property may be set to true to prevent the automatic closing of the flyout temporarily such as when a dialog associated with the pane is displayed.
Note: The flyout will still be closed if the flyout would be displayed for another pane such as might occur when another unpinned pane is activated. The ContentPaneCommands.FlyIn command will be considered disabled while this property is true.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2