mol-plugin: switch between data and behavior trees

src/mol-plugin/behavior/static/camera.ts

src/mol-plugin/behavior/static/representation.ts

src/mol-plugin/context.ts

src/mol-plugin/state.ts

src/mol-plugin/ui/action.tsx

src/mol-plugin/ui/controls.tsx

src/mol-plugin/ui/plugin.tsx

src/mol-plugin/ui/state-tree.tsx