Make columns itself scrollable, fix action creation when moving card, little refactoring

client/src/containers/AppContainer.js

@@ -1,16 +1,13 @@
 import { connect } from 'react-redux';
 
 import { currentModalSelector } from '../selectors';
-import ModalTypes from '../constants/ModalTypes';
 import App from '../components/App';
 
 const mapStateToProps = (state) => {
   const currentModal = currentModalSelector(state);
 
   return {
-    isUsersModalOpened: currentModal === ModalTypes.USERS,
-    isUserSettingsModalOpened: currentModal === ModalTypes.USER_SETTINGS,
-    isAddProjectModalOpened: currentModal === ModalTypes.ADD_PROJECT,
+    currentModal,
   };
 };