control opacity of datagrid header, mouseover, selected row vertical lines

[jeevitha]

sdk.getWidget("datagrid1").m_rowopacity = 0.8;
sdk.getWidget("datagrid1").m_headerrowopacity = 0.6;
sdk.getWidget("datagrid1").m_rowhoveropacity = 0.4;
sdk.getWidget("datagrid1").m_rowselectedopacity = 0.6;
sdk.getWidget("datagrid1").m_rowlinesopacity = 0.8;