tmf.ui: Add MultiViewChange-Id: I6117b37e0589fcc8b09363ba1dca1e0f35540c74Signed-off-by: Ivan Grinenko <ivan.grinenko@auriga.com>Reviewed-on: https://git.eclipse.org/r/156506Tested-by: Trace Compass Bot <tracecompass-bot@eclipse.org>Reviewed-by: Genevieve Bastien <gbastien+lttng@versatic.net>Tested-by: Genevieve Bastien <gbastien+lttng@versatic.net>Reviewed-by: Matthew Khouzam <matthew.khouzam@ericsson.com>Tested-by: Matthew Khouzam <matthew.khouzam@ericsson.com>