Bug 226956: Convert users of dialogOverlay.xul in mailnews/ to <dialog>. The patch also corrects some minor UI issues like missing/wrong access keys.

r=neil, sr=mscott

suite/themes/classic/messenger/smime/msgReadSecurityInfo.css

@@ -42,15 +42,6 @@
 
 @namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
 
-#msgReadSecurityInfo {
-  width: 40em;
-  max-width: 50em;
-}
-
-#outer_vbox {
-  margin: 5px;
-}
-
 #signatureLabel {
   font-weight: bold;
 }

suite/themes/modern/messenger/smime/msgReadSecurityInfo.css

@@ -42,15 +42,6 @@
 
 @namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
 
-#msgReadSecurityInfo {
-  width: 40em;
-  max-width: 50em;
-}
-
-#outer_vbox {
-  margin: 5px;
-}
-
 #signatureLabel {
   font-weight: bold;
 }