This is just a GUI issue I noticed.
When in "Sending Addresses" I wanted to delete a bunch of addresses. I then clicked delete, then I thought I had to highlight the area again to delete another. I then realised that I could just keep clicking DELETE and delete more addresses even though no address was highlighted.
I realised that a user could keep clicking DELETE and delete the wrong contact by mistake.
This is my first Issue report. Be kind :)