feat: add permissions check for inviting users

Author: akinsey

src/components/layout/Header.vue

@@ -55,8 +55,8 @@
             <i class="fa fa-eye" aria-hidden="true"></i>Watchlist
           </router-link>
         </li>
-        <li @click="showMobileMenu = false"> <!--v-if="canInvite()">-->
-          <a @click="showInvite = true">
+        <li @click="showMobileMenu = false">
+          <a v-if="permissionUtils.hasPermission('invitations.invite')" @click="showInvite = true">
             <i class="fa fa-user-plus" aria-hidden="true"></i>Invite Users
           </a>
         </li>
@@ -210,8 +210,8 @@
                 <li>
                   <router-link :to="{ name: 'Watchlist' }">Watchlist</router-link>
                 </li>
-                <li> <!--v-if="canInvite()">-->
-                  <a href="#" @click.prevent="showInvite = true">
+                <li>
+                  <a v-if="permissionUtils.hasPermission('invitations.invite')" @click.prevent="showInvite = true">
                     Invite User
                   </a>
                 </li>