Add react-modal, replace confirm usage with it

client/js/state/modals.js

@@ -0,0 +1,50 @@
+import { createSelector } from 'reselect';
+import createReducer from 'utils/createReducer';
+import * as actions from './actions';
+
+export const getModals = state => state.modals;
+
+export const getHasOpenModals = createSelector(
+  getModals,
+  modals => {
+    const keys = Object.keys(modals);
+
+    for (let i = 0; i < keys.length; i++) {
+      if (modals[keys[i]].isOpen) {
+        return true;
+      }
+    }
+    return false;
+  }
+);
+
+export default createReducer(
+  {},
+  {
+    [actions.OPEN_MODAL](state, { name, payload = {} }) {
+      state[name] = {
+        isOpen: true,
+        payload
+      };
+    },
+
+    [actions.CLOSE_MODAL](state, { name }) {
+      state[name].isOpen = false;
+    }
+  }
+);
+
+export function openModal(name, payload) {
+  return {
+    type: actions.OPEN_MODAL,
+    name,
+    payload
+  };
+}
+
+export function closeModal(name) {
+  return {
+    type: actions.CLOSE_MODAL,
+    name
+  };
+}