[balsa] compose window: Use correct action name

[Peter Bloomfield <peterb src gnome org>]

commit 12280691ace66489b04b83bf960a23da89957f89
Author: Peter Bloomfield <PeterBloomfield bellsouth net>
Date:   Wed May 20 16:29:26 2020 -0400

    compose window: Use correct action name

 src/sendmsg-window.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/sendmsg-window.c b/src/sendmsg-window.c
index f5349cb32..6d760e19b 100644
--- a/src/sendmsg-window.c
+++ b/src/sendmsg-window.c
@@ -4297,7 +4297,7 @@ sendmsg_window_get_toolbar_model(void)
 static void
 bsmsg_identities_changed_cb(BalsaSendmsg * bsmsg)
 {
-    sw_action_set_enabled(bsmsg, "SelectIdentity",
+    sw_action_set_enabled(bsmsg, "select-ident",
                      balsa_app.identities->next != NULL);
 }