[Plugin: Collapsible Archive Widget] Patch to add custom CSS

I found that some CSS settings for the theme I was using made this widget look wrong. I added a custom CSS file to the widget and fixed the issues I encountered. The following are relative to the 2.3.1 version of the Collapsible Archive Widget plugin.

Here are the changes I made to the collapsible-archive.php file:

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http://ww.wp.xz.cn/extend/plugins/collapsible-archive-widget/