bugfix: hide region sidebar on start annotation mode

Fix connectivity issues with siibra api

chore: reworked csp

Quick tour changes

feat: added key navigation
chore: added quicktour cleanup on destroy

chore: export texts

chore: more explicit setting of default nav

bugfix: context menu in threesurfer

chore: prettify freesurfer selector

feat: slight enh of perspective zoom behaviour

it also sets global nav state

invisible UI in mobile view