Bug 162102 [Workbench] User configurability for MAX_RECENT_WORKSPACES
MAX_RECENT_WORKSPACES=5 from org.eclipse.ui.ide.prefs needs to have an easier interface to change this value. It is obscured from users who need more then 5 workspaces.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/ChooseWorkspaceData.java
/**
	 * Return the current (persisted) value of the "showDialog on startup"
	 * preference. Return the global default if the file cannot be accessed.
	 */
	public static void setShowDialogValue(boolean showDialog) {
		
		
		
		ChooseWorkspaceData data = new ChooseWorkspaceData(""); 
		
		data.showDialog = showDialog;
		data.writePersistedData();
	}
    /**
	 * Look in the config area preference store for the list of recently used
	 * workspaces.
	 * 
	 * NOTE: During the transition phase the file will be checked if no config
	 * preferences are found.
	 * 
	 * @return true if the values were successfully retrieved and false
	 *         otherwise
	 */
	public boolean readPersistedData() {
		IPreferenceStore store = new ScopedPreferenceStore(
				new ConfigurationScope(), IDEWorkbenchPlugin.IDE_WORKBENCH);