Revert "vm-configurator: Only add USB kbd/mouse if supported"
Revert "vm-configurator: Only add USB kbd/mouse if supported"

This reverts commit 4296699a750ca42096264587e309f291e84dd813.

Turns out that Windows XP crashing on USB mouse being present, was
likely a temporary Qemu (or libvirt) bug and the crash is not
reproducible either on Fedora 21 or Fedora 22 anymore (which is where
it was observed on).

vbenes/gnome-boxes,vbenes/gnome-boxes