[IMP] mail: various ui improvements

including:
- reset scroll position to bottom when leaving channel
- allow clicking on the avatar image
- hide stars when message is of type notification
- sort channel names
- add # before channel names
- rename Whole company channel in general
- replace \n and \r in messages by <br/>
- lighten the hover color of sidebar items in the client action
- Display @ before mentions

addons/mail/static/src/xml/thread.xml

@@ -33,7 +33,18 @@
     <t t-name="mail.ChatThread.Message">
         <div class="o_thread_message" t-att-data-message-id="message.id">
             <div t-if="options.display_avatar" class="o_thread_message_sidebar">
-                <img t-if="message.avatar_src &amp;&amp; message.display_author" t-att-src="message.avatar_src" class="o_thread_message_avatar"/>
+                <t t-if="!message.mailto &amp;&amp; message.author_id[0]">
+                    <img t-if="message.avatar_src &amp;&amp; message.display_author"
+                        t-att-src="message.avatar_src"
+                        data-oe-model="res.partner"
+                        t-att-data-oe-id="message.author_id[0]"
+                        class="o_thread_message_avatar o_mail_redirect"/>
+                </t>
+                <t t-if="message.mailto || !message.author_id[0]">
+                    <img t-if="message.avatar_src &amp;&amp; message.display_author"
+                        t-att-src="message.avatar_src"
+                        class="o_thread_message_avatar"/>
+                </t>
                 <span t-if="!message.display_author" t-att-title="moment(message.date, 'YYYY-MM-DD hh:mm:ss').format('LLL')" class="o_thread_message_side_date">
                     <t t-esc="moment(message.date, 'YYYY-MM-DD hh:mm:ss').format('hh:mm')"/>
                 </span>
@@ -43,7 +54,7 @@
                     <i t-if="message.is_needaction &amp;&amp; options.display_needactions"
                        class="fa fa-check o_thread_message_needaction"
                        t-att-data-message-id="message.id" t-att-title="_t('Mark as Done')"/>
-                    <i t-if="options.display_stars"
+                    <i t-if="options.display_stars &amp;&amp; message.message_type != 'notification'"
                         t-att-class="'fa fa-lg o_thread_message_star ' + (message.is_starred ? 'fa-star' : 'fa-star-o')"
                         t-att-data-message-id="message.id" t-att-title="_t('Mark as Todo')"/>
                 </span>