Bug 274262 [History] Allow to never prune history
I20090429-0100. I never want to loose my history and I never want to waste time on shutdown (or start up) to do any history pruning. Please add a preference to disable pruning entirely.
bundles/org.eclipse.ui.ide.application/src/org/eclipse/ui/internal/ide/application/IDEWorkbenchAdvisor.java
private static final String WORKBENCH_PREFERENCE_CATEGORY_ID = "org.eclipse.ui.preferencePages.Workbench"; 
	/**
	 * The dialog setting key to access the known installed features since the
	 * last time the workbench was run.
	 */
	private static final String INSTALLED_FEATURES = "installedFeatures"; 
	private static IDEWorkbenchAdvisor workbenchAdvisor = null;
	/**
	 * Contains the workspace location if the -showlocation command line
	 * argument is specified, or <code>null</code> if not specified.
	 */
	private String workspaceLocation = null;
	/**
	 * Ordered map of versioned feature ids -> info that are new for this
	 * session; <code>null</code> if uninitialized. Key type:
	 * <code>String</code>, Value type: <code>AboutInfo</code>.
	 */
	private Map newlyAddedBundleGroups;
	/**
	 * Array of <code>AboutInfo</code> for all new installed features that
	 * specify a welcome perspective.
	 */