Bug 1319513 - Gray out the "Clear Downloads" item when disabled. r=mak

MozReview-Commit-ID: 5ooWpVF5CwO

--HG--
extra : rebase_source : 0b7dcbee4203368a3957fb7da38a679bb65ae010

browser/themes/linux/places/organizer.css

@@ -20,6 +20,10 @@
   color: ButtonText;
 }
 
+#placesToolbar > toolbarbutton[disabled=true] {
+  color: GrayText;
+}
+
 /* back button */
 
 #back-button {