Revert "Change default settings for automount"

This reverts commit 2cb4ef4d.

Sorry for the ping-pong, but I believe that this change is not needed due to the new UX in the Disks & Devices applet (plasma-workspace@2a80911b), which addresses the primary complaint about automount in different way. Going back to the prior behavior also addresses several other concerns about the new default from security and multi-user perspectives.

Merge request reports