Bug 132652 Click other property will cause the previous revised value lost in Properties sheet.
Description: Click other property will cause the previous revised value lost in Properties sheet. Steps to reproduce: 1. Insert a label 2. Open Properties sheet, select the label. 3. Input 10pt in Margin left, then click Margin right. Expected result: 10pt is saved. Actual result: 10pt was lost.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/swt/custom/CCombo.java
public int getVisibleItemCount () {
	checkWidget ();
	return visibleItemCount;
}
/**
* Gets the index of an item.
* <p>
* The list is searched starting at 0 until an
* item is found that is equal to the search item.
* If no item is found, -1 is returned.  Indexing
* is zero based.
*
* @param string the search item
* @return the index of the item
*
* @exception SWTError(ERROR_THREAD_INVALID_ACCESS)
*	when called from the wrong thread
* @exception SWTError(ERROR_WIDGET_DISPOSED)
*	when the widget has been disposed
* @exception SWTError(ERROR_NULL_ARGUMENT)
*	when string is null
*/
public int indexOf (String string) {
	checkWidget();
	if (string == null) SWT.error (SWT.ERROR_NULL_ARGUMENT);
	return list.indexOf (string);
}
/**
* Gets the index of an item.
* <p>