webadmin: fixes layout of profiles instance type editor in vm dialog

Change-Id: I329ccb7b15e1b3252659faf8151648318f05b39d
Bug-Url: https://bugzilla.redhat.com/1129194
Signed-off-by: Alona Kaplan <alkaplan@redhat.com>
(cherry picked from commit 234d5ee401ab5f6a627dded5cc54826dd4cfddd7)