portico: Add features to /features.

Add:
- Scheduled messages (new feature)
- Mute stream or topic
- Compliance exports (as part of "data exports")
- Help center

templates/corporate/features.html

@@ -195,10 +195,6 @@
             <p>Enjoy the benefits of threaded conversations while
             controlling your audience and privacy.</p>
         </a>
-        <a class="feature-block" href="/help/mute-a-user" target="_blank" rel="noopener noreferrer">
-            <h3>MUTE USER</h3>
-            <p>Users can mute anyone they'd rather not interact with.</p>
-        </a>
         <a class="feature-block" href="/help/edit-or-delete-a-message" target="_blank" rel="noopener noreferrer">
             <h3>MESSAGE EDITING</h3>
             <p>Don’t worry, you can always fix that typo, either in
@@ -224,6 +220,10 @@
             <p>Zulip’s drafts make it easy to write longer messages
             without worrying about losing your work.</p>
         </a>
+        <a class="feature-block" href="/help/schedule-a-message" target="_blank" rel="noopener noreferrer">
+            <h3>MESSAGE SCHEDULING</h3>
+            <p>Schedule a message to be sent later, when others are working.</p>
+        </a>
         <a class="feature-block" href="/help/streams-and-topics" target="_blank" rel="noopener noreferrer">
             <h3>CONVERSATIONS THREADED BY TOPIC</h3>
             <p>Participate in several conversations with the same
@@ -239,6 +239,15 @@
             <p>With topics, hotkeys and snappy performance, usefully
             reviewing hundreds of messages takes just minutes.</p>
         </a>
+        <a class="feature-block" href="/help/mute-a-stream" target="_blank" rel="noopener noreferrer">
+            <h3>MUTE STREAM OR TOPIC</h3>
+            <p>Manage notifications by muting streams and topics that don't
+            require your attention.</p>
+        </a>
+        <a class="feature-block" href="/help/mute-a-user" target="_blank" rel="noopener noreferrer">
+            <h3>MUTE USER</h3>
+            <p>Users can mute anyone they'd rather not interact with.</p>
+        </a>
         <a class="feature-block"
           href="/help/link-to-a-message-or-conversation#link-to-zulip-from-anywhere"
           target="_blank" rel="noopener noreferrer">
@@ -338,7 +347,8 @@
             <h3>DATA EXPORTS</h3>
             <p>
                 No vendor lock-in. Export your hosted Zulip to an
-                on-premises installation at any time.
+                on-premises installation at any time. You can also request a
+                compliance export.
             </p>
         </a>
         <a class="feature-block" href="/help/animated-gifs-from-giphy" target="_blank" rel="noopener noreferrer">
@@ -348,6 +358,13 @@
                 integration.
             </p>
         </a>
+        <a class="feature-block" href="/help" target="_blank" rel="noopener noreferrer">
+            <h3>HELP CENTER</h3>
+            <p>
+                It's easy to get started with detailed documentation and
+                onboarding guides in the Zulip help center.
+            </p>
+        </a>
         <a class="feature-block" href="https://github.com/zulip/zulip/" target="_blank" rel="noopener noreferrer">
             <h3>YOUR FEATURE HERE</h3>
             <p>Zulip is open source, so if something important for