frontend: fix behavior of console client doc window

This patch fixes behavior of console client resources window in webadmin
and userportal in MSIE. Previously the content window was opened without
the possibility of resizing and with invisible scrollbars.

Change-Id: Id872043b88c7cb8fc4077b79a696e97ec8891c8f
Bug-Url: https://bugzilla.redhat.com/1078141
Signed-off-by: Frantisek Kobzik <fkobzik@redhat.com>