<tree> and <tree-column>

Creates Tree and TreeColumn.
Examples :

<tree style="SWT.VIRTUAL | SWT.BORDER | SWT.V_SCROLL"
linesVisible="true" headerVisible="true" itemCount="20"
                 SWT.SetData="com.sheelapps.swtml.examples.TestListener">
<tree-column text="column 1" style="SWT.LEFT" width="150" />
<tree-column text="column 2" width="100" />
</tree>
 

<tree>
<tree-item _text="TopLevel" />                       
<tree-item _text="TopLevel 2" >                       
     <tree-item _text="TopLevel 2-1" />                       

</tree-item>
</tree>