Hide net status icon when not connected
Hide recording status icon when not recording
Hide status lock icon when workspace is not locked

The "locked" and "unlocked" icons look very similar, so hiding the icon
when the workspace is not locked, should make the actual lock icon stand out more.
Fix layer ACL control bugs

Locking a layer would cause per-user access controls to be forgotten.
Rename lock_closed icon for better theme integration
Add "import trusted certificate" button