Speed up sorting device for large amount of search results. Remember sorting state and filtering state. Added "Audio Length" column. Changed to Wingdings font in "Sources" column. (Win) Fixed some minor bugs.
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Cabos![[en]](http://static.sourceforge.jp/cf/gb.png "English"){kind=small}
![[ja]](http://static.sourceforge.jp/cf/jp.png "日本語"){kind=small}
