Bug 164070 Support widows/orphans properties on text item
Support widows/orphans properties on block text item(label, text, data etc), About the definition of widows/orphans, please refer to CSS spec.
model/org.eclipse.birt.report.model.tests/test/org/eclipse/birt/report/model/api/DesignElementHandleTest.java
* masterPageHandle.findContentSlot( labelHandle )</td>
 * <td>The return value should be 0</td>
 * </tr>
 * <td></td>
 * <td>Label1's container is MasterPage('My Page'), Evaluate the return value
 * designHandle.findContentSlot( labelHandle )</td>
 * <td>The return value should be -1</td>
 * </tr>
 * <td></td>
 * <td>Move one text item within MasterPage to ReportDesign</td>
 * <td>After move, text's container should be design</td>
 * </tr>
 * <tr>
 * <td></td>
 * <td>Move one text item within Table/Row/Cell to ReportDesign</td>
 * <td>After move, text's container should be design</td>
 * </tr>
 * <tr>
 * <td>testGetContanerSlot()</td>
 * <td>Get the slot handle of an element in a master page</td>
 * <td>The report element of the slot handle is the master page</td>
 * </tr>
 * <tr>
 * <td></td>
 * <td>Get the slot handle of an element in a cell</td>
 * <td>The report element of the slot handle is the cell</td>
 * </tr>
 * <tr>
 * <td></td>
 * <td>Get the slot handle of the design</td>