[enhancement] Way to select / update multiple contacts

[Bugsbane]

This is basically a wishlist to be able to select more than one contact at a time from the web ui. Mainly, my personal usecase is for selecting multiple contacts to delete, and for selecting multiple people from the same organization and enter that once instead of over and over again.

I imagine that the workflow would be ctrl/cmd/shift/long clicking the contacts (depending on the platform), which would then bring up something that looked like the contact display, but with "Various" or a similar word for each field where different contacts contained differing information. Any field should be able to be updated though, updating for all selected contacts.