side_drawer: add entry for bookmarks

It was not easily available in the narrow "mobile" interface
until now since both the desktop_nav and top nav panel are hidden.
Placing bookmarks after lists is consistent with the top nav panel
(though the top nav panel also puts interactions before both).

The recently removed "direct" timeline was similarly unavailable,
but its replacement, dm conversations, was already added to the
side drawer upon its introduction.

Fixes: #474

src/components/side_drawer/side_drawer.js

@@ -9,6 +9,7 @@ import {
   faHome,
   faComments,
   faBolt,
+  faBookmark,
   faUserPlus,
   faBullhorn,
   faSearch,
@@ -25,6 +26,7 @@ library.add(
   faHome,
   faComments,
   faBolt,
+  faBookmark,
   faUserPlus,
   faBullhorn,
   faSearch,

src/components/side_drawer/side_drawer.vue

@@ -85,6 +85,18 @@
             /> {{ $t("nav.lists") }}
           </router-link>
         </li>
+        <li
+          v-if="currentUser"
+          @click="toggleDrawer"
+        >
+          <router-link :to="{ name: 'bookmarks' }">
+            <FAIcon
+              fixed-width
+              class="fa-scale-110 fa-old-padding"
+              icon="bookmark"
+            /> {{ $t("nav.bookmarks") }}
+          </router-link>
+        </li>
       </ul>
       <ul v-if="currentUser">
         <li @click="toggleDrawer">