refactor: clean code

src/containers/TheSidebar.vue

@@ -1,5 +1,5 @@
 <template>
-  <CSidebar fixed :display="md">
+  <CSidebar fixed>
     <CSidebarHeader/>
     <CSidebarForm/>
     <CSidebarNav :navItems="computedNav"/>

src/router/index.js

@@ -62,7 +62,7 @@ Vue.use(Router)
 
 export default new Router({
   mode: 'hash', // https://router.vuejs.org/api/#mode
-  linkActiveClass: 'open active',
+  linkActiveClass: 'active',
   scrollBehavior: () => ({ y: 0 }),
   routes: [
     {

src/views/buttons/ButtonGroups.vue

@@ -120,7 +120,7 @@
             </CCardHeader>
             <CCardBody>
               <div>
-                <CButtonToolbar key-nav aria-label="Toolbar with button groups">
+                <CButtonToolbar aria-label="Toolbar with button groups">
                   <CButtonGroup class="mx-1">
                     <CButton class="d-sm-down-none">&laquo;</CButton>
                     <CButton>&lsaquo;</CButton>