Moved editor components out of js folder.

src/backend.tsx

src/editor/components/editor.css

src/editor/components/editor.tsx

src/editor/components/historynavigator.css

src/editor/components/historynavigator.tsx

src/editor/components/nodedetails.css

src/editor/components/nodedetails.tsx

src/editor/components/nodetypeentry.css

src/editor/components/nodetypeentry.tsx

src/editor/components/nodetypeseditor.css

src/editor/components/nodetypeseditor.tsx

src/editor/components/selectlayer.css

src/editor/components/selectlayer.tsx

src/editor/components/spacemanager.css

src/editor/components/spacemanager.tsx

src/editor/components/spaceselect.css

src/editor/components/spaceselect.tsx