Table select all

[rori4]

• add custom table view columns component with select all option (closes Select all in view columns dropdown #321)
• delete all custom on download functions since we want unselected columns not to be exported to CSV (closes Unselected columns are exported to CSV #323)
  since we already use

	downloadOptions: {
		filterOptions: {
			useDisplayedColumnsOnly: true,
			useDisplayedRowsOnly: true,
		},
	},

removing the onDownload functions makes the expected behavior in #323