Restore some margins when a widget is included in an iframe

That avoids any change for people integrating the widget in their websites, and hopefully that should reduce a lot of the UI screenshot differences.

plugins/Widgetize/stylesheets/widgetize.less

@@ -31,4 +31,8 @@
 #embedThisWidgetFlash,
 #embedThisWidgetEverywhere {
     margin-top: 5px;
-}
\ No newline at end of file
+}
+
+body>.widget {
+  margin: 10px 7px;
+}