Fix tabs not working (#175)

* Fix tabbing for AssessmentWorkspace

* Fix tabbing for GradingWorkspace

Author: remo5000

src/components/academy/grading/GradingWorkspace.tsx

@@ -103,8 +103,8 @@ class GradingWorkspace extends React.Component<GradingWorkspaceProps> {
   private sideContentProps: (p: GradingWorkspaceProps) => SideContentProps = (
     props: GradingWorkspaceProps
   ) => ({
-    activeTab: 0,
-    handleChangeActiveTab: (aT: number) => {},
+    activeTab: props.activeTab,
+    handleChangeActiveTab: props.handleChangeActiveTab,
     tabs: [
       {
         label: `Grading: Question ${props.questionId}`,

src/components/assessment/AssessmentWorkspace.tsx

@@ -123,8 +123,8 @@ class AssessmentWorkspace extends React.Component<
   private sideContentProps: (p: AssessmentWorkspaceProps) => SideContentProps = (
     props: AssessmentWorkspaceProps
   ) => ({
-    activeTab: 0,
-    handleChangeActiveTab: (aT: number) => {},
+    activeTab: props.activeTab,
+    handleChangeActiveTab: props.handleChangeActiveTab,
     tabs: [
       {
         label: `Task ${props.questionId}`,

src/reducers/workspaces.ts

@@ -53,7 +53,7 @@ export const reducer: Reducer<IWorkspaceManagerState> = (
         ...state,
         [location]: {
           ...state[location],
-          sideContentActiveTab: action.payload
+          sideContentActiveTab: action.payload.activeTab
         }
       }
     case CHANGE_EDITOR_WIDTH: