[tomboy] Note.cs: add a comment for translators

[Alex Tereschenko <alexter src gnome org>]

commit 15fbb54d0d30571eeba2a8572e1acbb3ca323282
Author: Alex Tereschenko <frozen and blue gmail com>
Date:   Tue Nov 22 22:11:42 2016 +0100

    Note.cs: add a comment for translators
    
    Signed-off-by: Alex Tereschenko <frozen and blue gmail com>

 Tomboy/Note.cs |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/Tomboy/Note.cs b/Tomboy/Note.cs
index 6535466..455607e 100644
--- a/Tomboy/Note.cs
+++ b/Tomboy/Note.cs
@@ -1739,6 +1739,8 @@ namespace Tomboy
                
                public static void ShowIOErrorDialog (Gtk.Window parent)
                {
+                       // Translators: "note autosaving" is a periodic process we normally run
+                       // in the background and not an invitation for the user to note something.
                        string errorMsg = Catalog.GetString ("An error occurred while saving your notes. " +
                                                             "Please check that you have sufficient disk " +
                                                             "space, and that you have appropriate rights " +