Bug 229084 [About] up/down buttons don't enable for About->Plug-in Details->Columns
The Columns dialog in About->Plug-in Details->Columns has an up and a down button. They don't enable when a list item is selected.
bundles/org.eclipse.jface/src/org/eclipse/jface/internal/ConfigureColumnsDialog.java
this.column = column;
			this.index = index;
			this.name = text;
			this.width = width;
			this.moveable = moveable;
			this.resizable = resizable;
			this.visible = visible;
		}
	}
	/**
	 * NON-API - This class is internal and will be moved to another package in
	 * 3.5. Creates a new dialog for configuring columns of the given column
	 * viewer. The column viewer must have an underlying {@link Tree} or
	 * {@link Table}, other controls are not supported.
	 * 
	 * @param shellProvider
	 * @param table
	 */
	public ConfigureColumnsDialog(IShellProvider shellProvider,
			Table table) {
		this(shellProvider, (Control)table);
	}
	
	/**
	 * NON-API - This class is internal and will be moved to another package in
	 * 3.5. Creates a new dialog for configuring columns of the given column
	 * viewer. The column viewer must have an underlying {@link Tree} or
	 * {@link Table}, other controls are not supported.
	 * 
	 * @param shellProvider