moved activity bar view constant into constants file

app/assets/javascripts/ide/components/activity_bar.vue

 <script>
 import { mapActions, mapGetters, mapState } from 'vuex';
 import Icon from '~/vue_shared/components/icon.vue';
-import { ActivityBarViews } from '../stores/state';
+import { ActivityBarViews } from '../constants';
 
 export default {
   components: {

app/assets/javascripts/ide/constants.js

 // Fuzzy file finder
 export const MAX_TITLE_LENGTH = 50;
 export const MAX_BODY_LENGTH = 72;
+
+export const ActivityBarViews = {
+  edit: 'ide-tree',
+  commit: 'commit-section',
+};

app/assets/javascripts/ide/stores/state.js

-export const ActivityBarViews = {
-  edit: 'ide-tree',
-  commit: 'commit-section',
-};
+import { ActivityBarViews } from '../constants';
 
 export default () => ({
   currentProjectId: '',

spec/javascripts/ide/components/activity_bar_spec.js

 import Vue from 'vue';
 import store from '~/ide/stores';
-import { ActivityBarViews } from '~/ide/stores/state';
+import { ActivityBarViews } from '~/ide/constants';
 import ActivityBar from '~/ide/components/activity_bar.vue';
 import { createComponentWithStore } from '../../helpers/vue_mount_component_helper';
 import { resetStore } from '../helpers';

spec/javascripts/ide/components/ide_side_bar_spec.js

 import Vue from 'vue';
 import store from '~/ide/stores';
 import ideSidebar from '~/ide/components/ide_side_bar.vue';
-import { ActivityBarViews } from '~/ide/stores/state';
+import { ActivityBarViews } from '~/ide/constants';
 import { createComponentWithStore } from 'spec/helpers/vue_mount_component_helper';
 import { resetStore } from '../helpers';
 import { projectData } from '../mock_data';