Reset store after disconnect

app/src/components/Sidebar/Sidebar.tsx

@@ -185,7 +185,7 @@ class Sidebar extends React.Component<Props, State> {
 
 const mapStateToProps = (state: AppState) => {
   return {
-    node: state.tree.selectedTopic,
+    node: state.tree.get('selectedTopic'),
   }
 }
 

app/src/components/Sidebar/ValueRenderer/ValuePanel.tsx

@@ -180,7 +180,7 @@ const mapDispatchToProps = (dispatch: any) => {
 const mapStateToProps = (state: AppState) => {
   return {
     valueRendererDisplayMode: state.settings.get('valueRendererDisplayMode'),
-    node: state.tree.selectedTopic,
+    node: state.tree.get('selectedTopic'),
   }
 }