X.A.TreeSelect: Deprecate tsDefaultConfig

Replace with Data.Default.def, as already happened a while ago (in
0f1b6fb7726fc54b0ef318143ab2ffc43faed8fa) in all other modules.

XMonad/Actions/TreeSelect.hs

@@ -40,6 +40,7 @@ module XMonad.Actions.TreeSelect
 
     , TSConfig(..)
     , tsDefaultConfig
+    , def
 
       -- * Navigation
       -- $navigation
@@ -113,7 +114,7 @@ import Graphics.X11.Xrender
 --
 -- Optionally, if you add 'workspaceHistoryHook' to your 'logHook' you can use the \'o\' and \'i\' keys to select from previously-visited workspaces
 --
--- > xmonad $ defaultConfig { ...
+-- > xmonad $ def { ...
 -- >              , workspaces = toWorkspaces myWorkspaces
 -- >              , logHook = workspaceHistoryHook
 -- >              }
@@ -131,9 +132,9 @@ import Graphics.X11.Xrender
 -- $config
 -- The selection menu is very configurable, you can change the font, all colors and the sizes of the boxes.
 --
--- The default config defined as 'tsDefaultConfig'
+-- The default config defined as 'def'
 --
--- > tsDefaultConfig = TSConfig { ts_hidechildren = True
+-- > def = TSConfig { ts_hidechildren = True
 -- >                , ts_background   = 0xc0c0c0c0
 -- >                , ts_font         = "xft:Sans-16"
 -- >                , ts_node         = (0xff000000, 0xff50d0db)
@@ -258,6 +259,7 @@ defaultNavigation = M.fromList
 -- Using nice alternating blue nodes
 tsDefaultConfig :: TSConfig a
 tsDefaultConfig = def
+{-# DEPRECATED tsDefaultConfig "Use def (from Data.Default, and re-exported by XMonad.Actions.TreeSelect) instead." #-}
 
 -- | Tree Node With a name and extra text
 data TSNode a = TSNode { tsn_name  :: String