Initial support for multi-station MVR-xchange

This update extends the local (TCP) implementation of the MVR-xchange protocol to allow exchange of MVR files in a group of stations.

• MVR-xchange - initial support for multiple connections
• Progress of Swedish translation by Daniel Nylander
• Set all protocols as disabled when a blender file is being open
• Add option to Beam setting to disable Temporal Reprojection in Eevee
• Ensure that fixture can always be removed from the list of fixtures even if the fixture had been damaged by manual edits