Allow Account level exclusion of user agents / bots

[#1]

We currently have our own automatic testing bot the periodically checks our website that specific tasks can be completed however these tests fail when we run experiments as we only change these tests when the winning experiment is deployed.

Would love it if Adobe Target could have an account level setting to exclude certain user agents so that experiments are not served to them.

I know this can be done at the moment on the per activity level but being able to do this at the account level would make it so make easier and avoid human error in forgetting to add it to the activity.