Split view 10094

This adds the first 'Figure Script' to the web client: Split View Figure, providing the same functionality as in Insight, but a more complete figure preview is shown and updated while editing parameters.

This also includes some re-arrangement of the right panel to include the "Publications options" button in a nascent toolbar at the top. Split View Figure script should only be enabled if a suitable Image(s) is chosen.

To test, run the Split View Figure script with one (or more) Images, checking that various parameters are updated in the UI when editing them (except Z-projection, Figure Name, format, Width & Height etc) and they have the same affect on the final figure.