[Fedora-xen] align fix for vmm-create.glade

[Dan Horák]

Hello,

in the virt-manager's new VM wizard there is a small alignment
inconsistency on the "Locating installation media" page for
paravirtualized machine. The second and third label are right aligned,
while the first (Install Media URL) is not. The included patch fixes
this issue.

	With regards,
		Dan Horak