Draft: add modules of draftutils to the proper Doxygen group

This includes `gui_utils`, `init_draft_statusbar`, `init_tools`,
`messages`, `todo`, `translate`, `utils`.

These are added to the `draftutils` Doxygen group
so that the functions contained in each module are listed
appropriately in the automatically generated documentation.

src/Mod/Draft/draftutils/messages.py

@@ -20,7 +20,7 @@
 # *   USA                                                                   *
 # *                                                                         *
 # ***************************************************************************
-"""Provide message utility functions for the Draft Workbench.
+"""Provides utility functions that wrap around the Console methods.
 
 The Console module has long function names, so we define some shorthands
 that are suitable for use in every workbench. These shorthands also include
@@ -28,27 +28,31 @@ a newline character at the end of the string, so it doesn't have to be
 added manually.
 """
 ## @package messages
-# \ingroup DRAFT
-# \brief Provide message utility functions for the Draft Workbench.
+# \ingroup draftutils
+# \brief Provides utility functions that wrap around the Console methods.
 
+## \addtogroup draftutils
+# @{
 import FreeCAD as App
 
 
 def _msg(text, end="\n"):
-    """Write messages to console including the line ending."""
+    """Write messages to the console including the line ending."""
     App.Console.PrintMessage(text + end)
 
 
 def _wrn(text, end="\n"):
-    """Write warnings to console including the line ending."""
+    """Write warnings to the console including the line ending."""
     App.Console.PrintWarning(text + end)
 
 
 def _err(text, end="\n"):
-    """Write errors to console including the line ending."""
+    """Write errors to the console including the line ending."""
     App.Console.PrintError(text + end)
 
 
 def _log(text, end="\n"):
     """Write messages to the log file including the line ending."""
     App.Console.PrintLog(text + end)
+
+## @}