fix unsaved answer when no answer is touched before confirming

client/index.js

@@ -322,7 +322,11 @@ const actions = {
   setFreeSlide: slideId => (state, actions) => {
     slideId = Math.min(state.slides.length, slideId);
     slideId = Math.max(0, slideId);
-    return { currentFreeSlideId: slideId, confirmed: false };
+    let answer = '';
+    if (state.kind === 'OFFLINE') {
+      answer = state.offlineAnswers[state.shuffledSlidesIndex[slideId]] || '';
+    }
+    return { currentFreeSlideId: slideId, confirmed: false, answer };
   },
   nextSlide: event => (state, actions) => {
     actions.requestSlide(state.currentSlideId + 1);