Collectivize models, workers and repositories + no more beta flag on models

src/components/Navbar.vue

@@ -66,18 +66,17 @@
               class="navbar-item"
               active-class="is-active"
             >
-              My workers
+              Workers
             </router-link>
             <router-link
               :to="{ name: 'models-list' }"
               class="navbar-item"
               active-class="is-active"
             >
-              <span>My models</span>
-              <span class="tag is-info ml-1">beta</span>
+              <span>Models</span>
             </router-link>
             <router-link :to="{ name: 'repos-list' }" class="navbar-item" active-class="is-active">
-              My repositories
+              Repositories
             </router-link>
             <a href="/admin/" class="navbar-item" v-if="isAdmin">
               Admin