webadmin: 'Vnic status' column was truncated in 'ja' locale

This patch removes the fixed sizes from all the columns besides the first.
In this way the columns size will be calculated automatically.


Bug-Url: https://bugzilla.redhat.com/923023
Change-Id: I6fea211f060a96f2fe6fa9f0842a6e3d9e7af7bc
Signed-off-by: Alona Kaplan <alkaplan@redhat.com>