Feature(challenges): add bug modal and logic

common/app/routes/challenges/redux/index.js

@@ -3,6 +3,7 @@ import completionSaga from './completion-saga';
 import nextChallengeSaga from './next-challenge-saga';
 import answerSaga from './answer-saga';
 import resetChallengeSaga from './reset-challenge-saga';
+import bugSaga from './bug-saga';
 
 export * as actions from './actions';
 export reducer from './reducer';
@@ -15,5 +16,6 @@ export const sagas = [
   completionSaga,
   nextChallengeSaga,
   answerSaga,
-  resetChallengeSaga
+  resetChallengeSaga,
+  bugSaga
 ];