--- a/dialogs/DurationEditorDialog.py	Wed Jun 27 17:13:06 2018 +0300
+++ b/dialogs/DurationEditorDialog.py	Wed Jun 27 18:13:31 2018 +0300
@@ -147,7 +147,7 @@
                 duration += format % value
                 not_null = True
 
-        duration += "%gms" % (milliseconds % SECOND)
+        duration += ("%f" % (milliseconds % SECOND)).rstrip("0").rstrip(".") + "ms"
         return duration
 
     def OnOK(self, event):