Toot menu, Copy shortcuts, … don't work for favorites/boosts, focused statuses, …

[chucker]

validateMenuItem currently expects a StatusTableCellView:

		guard let selectedIndex = tableView.selectedRowIndexes.first,
			  let view = tableView.view(atColumn: 0, row: selectedIndex, makeIfNecessary: false),
			  let cellView = view as? StatusTableCellView,
			  let cellModel = cellView.cellModel
		else {
			return false
		}