oria/gridx — pull request #258 by shanghaikid (2014-07-21 08:28:18+00:00)
Title: Optimize selection peformance

* _Base.js:_highlight() line 186, avoid highlighting rows which is out of the body
* _Base.js:_highlight() line 178, make sure do highlighting once on one item
* Row.js:_onMark line 356, avoid query rows which is out of the body
* body:_buildRowContent(), _buildRows(), save renderred row ids.
* body:refresh(), clear saved rednerred row ids.