Fix for 96899, unable to see addresswes when scrolling up in mailcompose. r=mscott, sr=brendan

git-svn-id: svn://10.0.0.236/branches/MOZILLA_0_9_4_BRANCH@103007 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/xpfe/components/autocomplete/resources/content/autocomplete.css

@@ -10,3 +10,12 @@
 .autocomplete-result-popup {
   display: -moz-popup !important;
 }
+
+/* The following rule is here to fix bug 96899.  Somehow trees create a situation
+   in which a popupset flows itself as if its popup child is directly within it
+   instead of the placeholder child that should actually be inside the popupset.
+   This is a stopgap measure, and it does not address the real bug.  */
+popupset {
+  max-width: 0px;
+  width: 0px;
+}