Allow to easily access SSH key access in the control panel, like the way it used to work in the old control panel.

Allow for easy enabled/disabling of an SSH key for any Hypernode, without having to remove the key all together. This is sort of possible on the Hypernode itself right now, but this should also be available for non-technical users through the control panel.

In the old control panel it was possible to just select which SSH keys should have access to which Hypernode and this worked perfectly.