Allow board delete via UI

ref #16

client/src/store/reducers/boards.js

@@ -16,12 +16,13 @@ export function boardsReducer(state = defaultState, action) {
 }
 
 function handleSaveBoardSuccess(state, action) {
+  const { board } = action;
   return {
     ...state,
     byID: {
       ...state.byID,
-      [action.board.id.toString()]: {
-        ...action.board,
+      [board.id]: {
+        ...board,
       }
     }
   };