Bug 1184447 - Fix XUL layout bug with wrapping labels in control center by using max-height:0 only when the panel isn't shown r=bgrins

browser/themes/shared/controlcenter/panel.inc.css

@@ -30,7 +30,7 @@
 /* PANEL */
 
 #identity-popup,
-.panel-viewstack[viewtype="main"]:not([transitioning]) > .panel-mainview[panelid=identity-popup] > #identity-popup-mainView {
+#identity-popup:not([panelopen]) .panel-viewstack[viewtype="main"]:not([transitioning]) #identity-popup-mainView {
   /* Tiny hack to ensure the panel shrinks back to its original
      size after closing a subview that is bigger than the main view. */
   max-height: 0;