GridFilter Issue: header text style is not getting changed

Hi All,



I am trying to use a Simple (local) filter to a grid. When filter text is being entered, the filter is getting activated properly but the column header text is not getting changed in the look (it should become Italic)



I found two links:

http://ift.tt/1ifM9gm (same issue as mine)



and



http://ift.tt/1opoaTk (correctly working)



The difference between these two is first one is using 3.0.0 RC, and the second one is using GXT 3.1 beta.



I am using GXT 3.0.1. So, is that a bug of 3.0.1??



Thanks