Only support quitting from the installer phase

Before we were allowing (R)efresh which was causing weird
UI flickering if invoked. This removes that ability and only
supplies the ability to quit the installation prematurely.

Signed-off-by: Adam Stokes <adam.stokes@ubuntu.com>
avoid creating kvm on landscape path
preliminary work on lds-baremetal
refactor mass connection
update macaddress prop to reflect that it's a list
Add LDS-specific node status checks