Prevent gtk_widget_error_bell() in clipboard watch

I'm not sure if the position setting is necessary at all.

README.adoc

@@ -10,12 +10,14 @@ The program offers both a terminal user interface, and a GTK+ 3 based UI.
 The styling of the latter will follow your theme, and may be customized
 from 'gtk.css'.
 
-image::tdv.png[align="center"]
-
 The project is covered by a permissive license, unlike vast majority of other
 similar projects, and can serve as a base for implementing other dictionary
 software.
 
+Screenshot
+----------
+image::tdv.png[align="center"]
+
 Packages
 --------
 Regular releases are sporadic.  git master should be stable enough.

src/tdv-gui.c

@@ -146,8 +146,8 @@ on_selection_received (G_GNUC_UNUSED GtkClipboard *clipboard, const gchar *text,
 	gchar *trimmed = g_strstrip (g_strdup (text));
 	gtk_entry_set_text (GTK_ENTRY (g.entry), trimmed);
 	g_free (trimmed);
-	g_signal_emit_by_name (g.entry,
-		"move-cursor", GTK_MOVEMENT_BUFFER_ENDS, 1, FALSE);
+
+	gtk_editable_set_position (GTK_EDITABLE (g.entry), -1);
 }
 
 static void