would it be possible to get tick boxes with a select all tick box to make multiple selections when Deleting (I can see there is a delete all option under actions)
Have to think about it. In the table views it would be easy and could also be used to move multiple files to other groups. So a good improvement for the next generation ui.
It could be used for move, delete and even creating a print queue
In deed print queue is an other useful many x operation.