"Delete all files" button

[pandelis]

In the "files" part of a component, it would be nice to have a "delete all" button.

What is currently happening?

When we have lots of stimuli (for instance 100) and we need to delete them one by one it can be really painful... (for the moment I use a tool named MouseCliker to repeat cliking.

A simple "delete all" button would resolve this problem.

Please describe the steps needed to reproduce this phenomenon