FIRE-24147 - Disable pose stand when the avatar is sitting to prevent animation issues

indra/newview/app_settings/commands.xml

@@ -509,6 +509,7 @@
            execute_parameters="fs_posestand"
            is_running_function="Floater.IsOpen"
            is_running_parameters="fs_posestand"
+           is_enabled_function="Agent.enableFlying"
            />
   <command name="snapshot_to_disk"
            available_in_toybox="true"

indra/newview/skins/default/xui/en/menu_viewer.xml

@@ -353,6 +353,8 @@
             <menu_item_call.on_click
 			function="Floater.Show"
 			parameter="fs_posestand" />
+			<menu_item_call.on_enable
+				function="Self.EnableSitDown" />
         </menu_item_call>
 
         <menu_item_separator/>