Bug 1030103 Loop button doesn't overflow when window width is reduced. r=mconley

browser/base/content/browser.xul

@@ -799,7 +799,6 @@
                        tooltiptext="&loopCallButton.tooltip;"
                        oncommand="LoopUI.openCallPanel(event);"
                        cui-areatype="toolbar"
-                       overflows="false"
                        >
         </toolbarbutton>
 #endif