0.2.0

Added

• The About dialog shows the app version.
• Audit log (admin only): View ▸ Events History and an Events tab on clusters,
  hosts and VMs show who changed what and when, with the outcome of agent tasks
  and the before/after of each change. Needs ovc-backend 0.2.0
  (GET /audit-events).

Changed

• Menu items no longer end with an ellipsis (menu bar, VM More ▾, host
  Actions ▾).
• An Off VM's console preview shows "No preview - VM is off" instead of its
  last, stale thumbnail.