fix(user): add the new features and cleanup old main files

Signed-off-by: Dorra Jaouad <[email protected]>

Author: DorraJaouad

user_manual/talk/advanced_features.rst

@@ -30,4 +30,38 @@ All users will be able to click the files to view, edit or download them, irresp
 .. image:: images/editing-document-in-chat-room.png
    :width: 600px
 
-.. FIXME Add polls, voice messages?, shared items view
+Polls in chat
+-------------
+
+You can create a poll in groups chats from the new message additional actions.
+
+.. image:: images/create-new-poll.png
+   :width: 400px
+
+A poll has two settings:
+
+- **Anonymous polls**: Participants cannot see who voted for which option.
+- **Allow multiple choices**: Participants can select more than one option.
+
+You can also import polls for auto-fill and export polls as JSON files to save it locally.
+
+.. image:: images/import-poll.png
+   :width: 400px
+
+Closing poll is possible from the poll dialog.
+
+.. image:: images/close-poll.png
+   :width: 400px
+
+As a moderator, you can create the poll directly or you can save it as a draft to edit it later. 
+
+.. image:: images/save-poll-draft.png
+   :width: 400px
+
+You can find poll drafts in ``Shared items`` tab or next to the poll title input field.
+
+.. image:: images/poll-drafts-list.png
+   :width: 400px
+
+
+.. FIXME voice messages?, shared items view

user_manual/talk/attachments.rst

@@ -0,0 +1,33 @@
+Calendar integration with Talk
+==============================
+
+Meetings and events
+--------------------
+
+If calendar events have a Talk conversation set as event location, you will see an information about upcoming events inside of this conversation.
+That way you can stay informed about scheduled meetings or activities directly within your chat.
+If Calendar app is enabled, you can click on an event to view details.
+
+.. image:: images/events-upcoming.png
+    :width: 400px
+
+It is possible to schedule a meeting directly from a conversation. In the dialog, you can set meeting details such as title, date, time and description.
+You can also choose to invite all participants including email guests, or select specific ones.
+
+.. image:: images/talk-schedule-meeting.png
+   :width: 400px
+
+Schedule from Calendar
+^^^^^^^^^^^^^^^^^^^^^^
+
+When creating a new event in Calendar, you can set a Talk conversation as event location. This will create a new conversation if one does not exist yet.
+
+.. image:: images/calendar-create-event.png
+   :width: 600px
+
+When the event is created, you will see a link to the conversation in the event details. Conversation will also show up in the list of conversations (discoverable by ``Events`` filter).
+
+.. image:: images/event-conversation-list.png
+   :width: 300px
+
+Like instant meetings, event conversations will be automatically deleted after configured period of inactivity (by default 28 days).