Fix PopupMenu submenu item not popping on mouse enter

Author: Koyper

doc/classes/PopupMenu.xml

@@ -660,8 +660,9 @@
 			If [code]true[/code], [MenuBar] will use native menu when supported.
 			[b]Note:[/b] If [PopupMenu] is linked to [StatusIndicator], [MenuBar], or another [PopupMenu] item it can use native menu regardless of this property, use [method is_native_menu] to check it.
 		</member>
-		<member name="submenu_popup_delay" type="float" setter="set_submenu_popup_delay" getter="get_submenu_popup_delay" default="0.3">
+		<member name="submenu_popup_delay" type="float" setter="set_submenu_popup_delay" getter="get_submenu_popup_delay" default="0.2">
 			Sets the delay time in seconds for the submenu item to popup on mouse hovering. If the popup menu is added as a child of another (acting as a submenu), it will inherit the delay time of the parent menu item.
+			[b]Note:[/b] If the mouse is exiting a submenu item with an open submenu and enters a different submenu item, the submenu popup delay time is affected by the direction of the mouse movement toward the open submenu. If the mouse is moving toward the submenu, the open submenu will wait approximately [code]0.5[/code] seconds before closing, which then allows the hovered submenu item to open. This additional delay allows the mouse time to move to the open submenu across other menu items without prematurely closing. If the mouse is not moving toward the open submenu, for example in a downward direction, the open submenu will close immediately.
 		</member>
 		<member name="system_menu_id" type="int" setter="set_system_menu" getter="get_system_menu" enum="NativeMenu.SystemMenus" default="0">
 			If set to one of the values of [enum NativeMenu.SystemMenus], this [PopupMenu] is bound to the special system menu. Only one [PopupMenu] can be bound to each special menu at a time.