Changelog

[Change] Removed animation & sound when switching pages
[Change] Moved page audio feature to new dedicated media bar
[New] Added page video feature (record from webcam or upload mp4 video)
[New] Added audio visualiser in media bar
[New] Themes now support page video
[New] Dock theme supports new 'Floating' navigation elements (suggested by Nabil Guermouche) - see preset editing documentation
[Bugfix] Fixed some untrapped errors dropping documents
[Bugfix] Moved preview root in data warehouse