userportal,webadmin: shrink VM,Pool,Template window

Shrinked the window so it fits to 1024x768 resolution.

Change-Id: I84598f10564b8069077db6f67e977a049c8b946c
Bug-Url: https://bugzilla.redhat.com/879329
Bug-Url: https://bugzilla.redhat.com/879331
Bug-Url: https://bugzilla.redhat.com/879334
Signed-off-by: Tomas Jelinek <tjelinek@redhat.com>