Add documentation.

doc/user-guide.md

@@ -41,6 +41,7 @@
   - [`AutoHideSideBarsIconOnly`](#autohidesidebarsicononly)
   - [`AutoHideShowOnMouseOver`](#autohideshowonmouseover)
   - [`AutoHideCloseButtonCollapsesDock`](#autohideclosebuttoncollapsesdock)
+  - [`AutoHideDockHasMinimizeButton`](#autohidedockhasminimizebutton)
 - [DockWidget Feature Flags](#dockwidget-feature-flags)
   - [`DockWidgetClosable`](#dockwidgetclosable)
   - [`DockWidgetMovable`](#dockwidgetmovable)
@@ -51,6 +52,7 @@
   - [`DockWidgetForceCloseWithArea`](#dockwidgetforceclosewitharea)
   - [`NoTab`](#notab)
   - [`DeleteContentOnClose`](#deletecontentonclose)
+  - [`AutoHideDockWidgetClosable`](#autohidedockwidgetclosable)
 - [Central Widget](#central-widget)
 - [Empty Dock Area](#empty-dock-area)
 - [Custom Close Handling](#custom-close-handling)
@@ -610,6 +612,11 @@ closing it.
 
 ![AutoHideCloseButtonCollapsesDock true](cfg_flag_AutoHideCloseButtonCollapsesDock_true.gif)
 
+### `AutoHideDockHasMinimizeButton`
+
+Similar to the reason for `AutoHideCloseButtonCollapsesDock`, if this flag is set, 
+the auto hide widget will have a minimize button that collapses the auto hide widget.
+
 ## DockWidget Feature Flags
 
 ### `DockWidgetClosable`
@@ -661,6 +668,10 @@ Deletes only the contained widget on close, keeping the dock widget intact and
 in place. Attempts to rebuild the contents widget on show if there is a widget
 factory set. See [issue #365](https://github.com/githubuser0xFFFF/Qt-Advanced-Docking-System/pull/365) for more details.
 
+### `AutoHideDockWidgetClosable`
+
+If set, the close button in the auto hide widget will be enabled.
+
 ## Central Widget
 
 The Advanced Docking System has been developed to overcome the limitations of