Update live demo 3.2.0

[will-moore]

Updating demo.

Staged at http://figure.staging.openmicroscopy.org/demo/#file/1

To test:

• check latest 3.2.0 features are working, e.g. crop page, rename.
• Also check Help > version 3.2.0.

Several other features won't work, e.g. labels from tags, LUTs, ROIs etc since they need a live server.

[jburel]

Features are working we should look into better ways to have demo running (not now)