Eliminate many "doing what you told me to" messages

These messages were perhaps originally intended as a debuggin aid but now add clutter to the output panes. Remaining messges are mostly the result of methods to display attributes of an object (which one could call from the Python console) or actually provide some information which would not be obvious from the circumstances

src/Mod/Draft/draftutils/groups.py

@@ -38,7 +38,7 @@ import FreeCAD as App
 import draftutils.utils as utils
 
 from draftutils.translate import translate
-from draftutils.messages import _msg, _err
+from draftutils.messages import _err
 
 
 def is_group(obj):
@@ -128,8 +128,7 @@ def ungroup(obj):
 
     found, obj = utils.find_object(obj, doc=App.activeDocument())
     if not found:
-        _msg("obj: {}".format(obj_str))
-        _err(translate("draft", "Wrong input: object not in document."))
+        _err(translate("draft", "Wrong input: object {} not in document.").format(obj_str))
         return None
 
     doc = obj.Document