bugfix: plugin state no longer honored

fix https://github.com/HumanBrainProject/interactive-viewer/issues/465

Dev spatial backend for change template

bugfix: url parsing + added test

added test for restoring state

chore: use regionId for querying dataset

Dev show connectivity dataset

e2e test on PR branch

chore: use fullId for regions

Add connectivity region hemispheres and dataset info

bugfix: enable Prod mode