Bug 213040 [Markers] Selected filters not being kept on restart
When I select "Warnings on Selection" and then restart it is not selected when I come back in. We need to retain these selections. Note this is only a problem when selecting from the menu - from the dialog works fine.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/provisional/views/markers/MarkerContentGenerator.java
allFieldList.toArray(allFields);
		visibleFields = new MarkerField[visibleFieldList.size()];
		visibleFieldList.toArray(visibleFields);
	}
	/**
	 * Return whether or not we are showing a hierarchy,.
	 * 
	 * @return <code>true</code> if a hierarchy is being shown.
	 */
	boolean isShowingHierarchy() {
		return categoryGroup != null;
	}
	/**
	 * Load the filters preference.
	 */
	private void loadFiltersPreference() {
		String mementoString = IDEWorkbenchPlugin.getDefault()
				.getPreferenceStore().getString(getMementoPreferenceName());
		if (mementoString.equals(IPreferenceStore.STRING_DEFAULT_DEFAULT))
			return;
		try {
			loadSettings(XMLMemento.createReadRoot(new StringReader(
					mementoString)));
		} catch (WorkbenchException e) {
			StatusManager.getManager().handle(e.getStatus());
		}
	}
	/**
	 * Load the group with id from the child if there is a matching system group
	 * registered.