webadmin: vm name field is misaligned on "new vm" pop up window

The mistake happend during the backport. The patch to master branch
(http://gerrit.ovirt.org/#/c/31034) contains the configuration of the
"nameEditorContent" as "width: 238px", while the backport patch
(http://gerrit.ovirt.org/#/c/31159) contains the width: "230px".

This patch fixes this backport mistake to make also the 3.5 version 238px
width.

Change-Id: I05dba94b33a72ae0644b4f543d257efed52a3fb4
Bug-Url: https://bugzilla.redhat.com/1133995
Signed-off-by: Tomas Jelinek <tjelinek@redhat.com>