refactor: move hideMobile mixin to Sidebar folder

Author: woothu

src/components/Sidebar/CSidebar.vue

@@ -5,7 +5,7 @@
 </template>
 <script>
 import { mixin as clickaway } from 'vue-clickaway2'
-import { hideMobile } from '../../mixins/hideMobile'
+import { hideMobile } from './hideMobile'
 
 export default {
   name: 'CSidebar',

src/components/Sidebar/CSidebarNavItem.vue

@@ -24,7 +24,7 @@
 </template>
 
 <script>
-import { hideMobile } from '../../mixins/hideMobile'
+import { hideMobile } from './hideMobile'
 export default {
   name: 'CSidebarNavItem',
   mixins: [ hideMobile ],