refactor: Viewports state (#1218)

* Organize viewports reducers

* Organize viewports actions

* Add local state to store dom node and remove hack

* Comment usage of dom in vtk

* Fix set of enabledElements

* Fix warning in html viewport

* Update docs for state

* Add commandsmanager to commandsmodule

extensions/dicom-html/src/ConnectedDicomHtmlViewport.js

@@ -6,7 +6,7 @@ const { setViewportActive } = OHIF.redux.actions;
 
 const mapStateToProps = (state, ownProps) => {
   const { viewportIndex, byteArray } = ownProps;
-  const activeViewportIndex = state.viewports;
+  const { activeViewportIndex } = state.viewports;
 
   return {
     viewportIndex,

extensions/dicom-html/src/DicomHtmlViewport.js

@@ -238,7 +238,7 @@ class DicomHtmlViewport extends Component {
     } = this.props;
 
     if (viewportIndex !== activeViewportIndex) {
-      setViewportActive();
+      setViewportActive(viewportIndex);
     }
   };