* Convert Slot, Miller, DirectoryView, ListView, ColumnView and IconView to Vala. * Use standard Gtk.TreeView and Gtk.IconView * Address a number of bugs associated with the views. * Some changes made to ViewContainer - new slots only made when view mode changes, not when location changes. * For improved accessibility, helper emblem appears in all views but only when the icons are above a minimum size. * Implemented bookmarking from context menu * Implemented "Open in New Window" in context menu * Context menu and app menu reimplemented without deprecated code.