muc-views: Use native methods instead of lodash

src/templates/chatroom_destroyed.html

 <div class="alert alert-danger">
     <h3 class="alert-heading disconnect-msg">{{{o.__('This groupchat no longer exists')}}}</h3>
-
     <p class="destroyed-reason">{{{o.reason}}}</p>
-
     {[ if (o.jid) { ]}
-    <p class="moved-label">
-        {{{o.__('The conversation has moved. Click below to enter.') }}}
-    </p>
+        <p class="moved-label">{{{o.__('The conversation has moved. Click below to enter.') }}}</p>
         <p class="moved-link"><a class="switch-chat" href="#">{{{o.jid}}}</a></p>
     {[ } ]}
 </div>

src/templates/chatroom_details_modal.html

@@ -12,7 +12,7 @@
                     <p class="room-info"><strong>{{{o.__('Description')}}}</strong>: {{{o.config.description}}}</p>
                     {[ if (o.subject) { ]}
                     <p class="room-info"><strong>{{{o.__('Topic')}}}</strong>: {{o.topic}}</p> <!-- Sanitized in converse-muc-views. We want to render links. -->
-                        <p class="room-info"><strong>{{{o.__('Topic author')}}}</strong>: {{{o._.get(o.subject, 'author')}}}</p>
+                        <p class="room-info"><strong>{{{o.__('Topic author')}}}</strong>: {{{o.subject && o.subject.author}}}</p>
                     {[ } ]}
                     <p class="room-info"><strong>{{{o.__('Online users')}}}</strong>: {{{o.num_occupants}}}</p>
                     <p class="room-info"><strong>{{{o.__('Features')}}}</strong>:

src/templates/chatroom_disconnect.html

 <div class="alert alert-danger">
-    <h3 class="alert-heading disconnect-msg">{{{o.disconnect_messages[0]}}}</h3>
-
-    {[ o._.forEach(o.disconnect_messages.slice(1), function (msg) { ]}
+    <h3 class="alert-heading disconnect-msg">{{{o.messages[0]}}}</h3>
+    {[ o.messages.slice(1).forEach(function (msg) { ]}
         <p class="disconnect-msg">{{{msg}}}</p>
     {[ }); ]}
 </div>

src/templates/occupant.html

 <li class="occupant" id="{{{ o.id }}}"
     {[ if (o.role === "moderator") { ]}
-       title="{{{ o.jid }}} {{{ o.desc_moderator }}} {{{ o.hint_occupant }}}"
+       title="{{{ o.jid }}} {{{ o.__('This user is a moderator.') }}} {{{ o.hint_occupant }}}"
     {[ } ]}
     {[ if (o.role === "participant") { ]}
-       title="{{{ o.jid }}} {{{ o.desc_participant }}} {{{ o.hint_occupant }}}"
+       title="{{{ o.jid }}} {{{ o.__('This user can send messages in this groupchat.') }}} {{{ o.hint_occupant }}}"
     {[ } ]}
     {[ if (o.role === "visitor") { ]}
-       title="{{{ o.jid }}} {{{ o.desc_visitor }}} {{{ o.hint_occupant }}}"
+       title="{{{ o.jid }}} {{{ o.__('This user can NOT send messages in this groupchat.') }}} {{{ o.hint_occupant }}}"
     {[ } ]}
-    {[ if (!o._.includes(["visitor", "participant", "moderator"], o.role)) { ]}
+    {[ if (!["visitor", "participant", "moderator"].includes(o.role)) { ]}
        title="{{{ o.jid }}} {{{ o.hint_occupant }}}"
     {[ } ]}>
     <div class="row no-gutters">
@@ -19,20 +19,20 @@
             <span class="occupant-nick">{{{o.nick || o.jid}}}</span>
             <span class="occupant-badges">
                 {[ if (o.affiliation === "owner") { ]}
-                    <span class="badge badge-groupchat">{{{o.label_owner}}}</span>
+                    <span class="badge badge-groupchat">{{{o.__('Owner')}}}</span>
                 {[ } ]}
                 {[ if (o.affiliation === "admin") { ]}
-                    <span class="badge badge-info">{{{o.label_admin}}}</span>
+                    <span class="badge badge-info">{{{o.__('Admin')}}}</span>
                 {[ } ]}
                 {[ if (o.affiliation === "member") { ]}
-                    <span class="badge badge-info">{{{o.label_member}}}</span>
+                    <span class="badge badge-info">{{{o.__('Member')}}}</span>
                 {[ } ]}
 
                 {[ if (o.role === "moderator") { ]}
-                    <span class="badge badge-info">{{{o.label_moderator}}}</span>
+                    <span class="badge badge-info">{{{o.__('Moderator')}}}</span>
                 {[ } ]}
                 {[ if (o.role === "visitor") { ]}
-                    <span class="badge badge-secondary">{{{o.label_visitor}}}</span>
+                    <span class="badge badge-secondary">{{{o.__('Visitor')}}}</span>
                 {[ } ]}
             </span>
         </div>