We agreed on using the same selection mechanism as the rest of the desktop, which is to use left-click for single selection and + shift for range selection, or + ctrl for individual selection of several contacts. That's how the contacts picker works, and making it behave differently than the rest of the desktop would make it look completely out of place. That's why we removed the double-click selection mode the first versions of the contacts picker had.
We agreed on using the same selection mechanism as the rest of the desktop, which is to use left-click for single selection and + shift for range selection, or + ctrl for individual selection of several contacts. That's how the contacts picker works, and making it behave differently than the rest of the desktop would make it look completely out of place. That's why we removed the double-click selection mode the first versions of the contacts picker had.
So closing, as this is not a bug