Bug 56818 [PropertiesView] Clicking on Advanced Properties toggle when categories are collapsed removes the + next to the category
Clicking on Advanced Properties toggle when categories are collapsed removes the plus sign (+) next to the category and it can no longer be expanded. To reproduce: 1.)Open the Properties view. 2.)Have Show Categories turned on, and Show Advanced Properties turned off. 3.)Collapse all open categories. 4.)Click the Show Advanced Properties button. 5.)Note the plus sign goes away and the categories can no longer be expanded. You need to click the Show Advanced Properties button off to see the plus sign again.
bundles/org.eclipse.ui.views/src/org/eclipse/ui/views/properties/PropertySheetViewer.java
else
					column = new TableColumn(table, 0);
				column.setText(string);
			}
		}
		
		ColumnLayoutData c1Layout = new ColumnWeightData(40, false);
		
		ColumnLayoutData c2Layout = new ColumnWeightData(60, true);
		
		TableLayout layout = new TableLayout();
		layout.addColumnData(c1Layout);
		layout.addColumnData(c2Layout);
		table.setLayout(layout);
	}
	/**
	 * Asks the entry currently being edited to apply its current cell editor
	 * value.
	 */
	private void applyEditorValue() {
		TableTreeItem treeItem = tableTreeEditor.getItem();
		
		if (treeItem == null || treeItem.isDisposed())
			return;
		IPropertySheetEntry entry = (IPropertySheetEntry) treeItem.getData();
		entry.applyEditorValue();
	}
	/**
	 * Creates the child items for the given widget (item or table tree). This
	 * method is called when the item is expanded for the first time or when an