For the dialog flow, these options are the same, the only effect
is that there's no longer an initial network boot phase.
PXE is dependent on an external server setup that is not common
in the scheme of things, so giving it a first class option on the
front of the new VM wizard isn't really sensible. Users that want
to PXE boot can easily do so via the 'customize before install'
option, or just manually create a VM and edit the boot device as
they see fit.
Explicitly advertising a Manual option is nicer for users that
just want to create a VM and deal with install later, among many
other minor use cases.
Signed-off-by: Cole Robinson <crobinso@redhat.com>
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