Make the font size menu always set a zoom level as interim fix until we've hooked up mousewheel font size changing to this menu.

bug=57480, r=bryner, a=ben

xpfe/browser/resources/content/navigator.js

@@ -1257,9 +1257,6 @@ function BrowserEditBookmarks()
     if (aZoomFactor < 1 || aZoomFactor > 5000)
       return;
 
-    if (aZoomFactor == zoomFactor)
-      return;
-
     zoomFactor = aZoomFactor;
 
     if (isZoomFactorInRange(zoomFactor)) {