修改netzke Ext日期的格式化

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1. netzke-basepack/javascripts/basepack.js

timeFormat: "g:i:s" 改为 timeFormat: "H:i:s"

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2. netzke-basepack/lib/netzke/basepack/grid_panel/javascripts/grid_panel.js

"Y-m-d g:i:s" 改为 "Y-m-d H:i:s"