[evolution] Add a comment for translators above "_Send Account Override"

[Milan Crha <mcrha src gnome org>]

commit 0135f17dbe4ae75c33628a26a8f693d657c6ef31
Author: Milan Crha <mcrha redhat com>
Date:   Tue Mar 4 16:26:45 2014 +0100

    Add a comment for translators above "_Send Account Override"

 mail/em-folder-properties.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/mail/em-folder-properties.c b/mail/em-folder-properties.c
index ba51b64..c41a05e 100644
--- a/mail/em-folder-properties.c
+++ b/mail/em-folder-properties.c
@@ -281,6 +281,8 @@ emfp_get_folder_item (EConfig *ec,
        /* add send-account-override setting widgets */
        registry = e_shell_get_registry (e_shell_get_default ());
 
+       /* Translators: Label of a combo with a list of configured accounts where a user can
+          choose which account to use as the sender when composing a message in this folder */
        label = gtk_label_new_with_mnemonic (_("_Send Account Override:"));
        gtk_widget_set_halign (label, GTK_ALIGN_START);
        gtk_widget_show (label);