Fix visual bell styling.

common/content/dactyl.js

@@ -124,7 +124,6 @@ const Dactyl = Module("dactyl", {
      * 'visualbell' option.
      */
     beep: requiresMainThread(function () {
-        dactyl.dumpStack();
         // FIXME: popups clear the command line
         if (options["visualbell"]) {
             // flash the visual bell

common/content/dactyl.xul

@@ -33,7 +33,8 @@
         </keyset>
 
         <popupset>
-            <panel id="dactyl-visualbell" dactyl:highlight="Bell"/>
+            <panel id="dactyl-visualbell" dactyl:highlight="Bell"
+                   noautohide="true" noautofocus="true"/>
         </popupset>
 
         <!--this notifies us also of focus events in the XUL

common/skin/dactyl.css

@@ -69,6 +69,10 @@
 @-moz-document
     url-prefix(chrome://) {
 
+[dactyl|highlight~=Bell] {
+    -moz-appearance: none;
+}
+
 [dactyl|highlight~=CmdLine] {
     background: inherit;
     color: inherit;