RFE: RHEV-M should have a field/column chooser in the UI that is saved for the logged in user.

Issue

• RHEV-M should have a field/column chooser in the UI that is saved for the logged in user. i.e we want the guest 'OS Version' and 'Comments' fields displayed. We'd also remove the Cluster and DataCentre columns as we only have one DC and Cluster per RHEV-M node.
• Add / hide columns with all available API parameters in RHEV-M Admin Portal
• Memory and CPU allocation in Virtual Machines summary page