* Fixed: an issue that the page in widgets.php freezes in IE in WordPress 3.6.
* Tweaked: the plugin's JacaScript script loaded in the widgets.php page.
* Changed: the Responsive Column Widget Box widget form selector option to have the first item with the empty value which prevents unwanted sidebar dependency conflicts.
* Fixed: a bug that orphaned sidebars named **Inactive Sidebar (not used)** appeared in the select option items of the plugin's Responsive Column Widget Box widget's form after switching the theme.
* Fixed: a bug that the error "FATAL ERROR: MAXIMUM FUNCTION NESTING LEVEL OF '100' REACHED, ABORTING!" occurs when a sidebar dependency conflict occur with the sidebar encapsulation functionality and added an plugin error message instead.
* Fixed: a bug introduced in 1.1.7 that undefined index warnings and errors with array_filter() occur when a theme's sidebar is used instead of the plugin's widget box.


git-svn-id: https://plugins.svn.wordpress.org/responsive-column-widgets/trunk@751750 b8457f37-d9ea-0310-8a92-e5e31aec5664