webadmin: remove attach table form edit network dialog

The gui will always permit editing a network.
If by any reason the network can't be edited, a canDo will be thrown.

In this patch-
- Removing the attach table from the edit network model-view-presneter.
- Removing the apply action from the dialog (mvp).
- Remove the functionality of enabling/disabling the update fileds
according to if the network is attached to clusters.

Change-Id: If23582ec3489c1aea6f3e1470d16f94be1c195ba
bug-url: https://bugzilla.redhat.com/604646
Signed-off-by: Alona Kaplan <alkaplan@redhat.com>