[FIX] mail: avoid empty seen indicator

`MessageSeenIndicator` sub-component should not be rendered if the thread does
not support seen indicators.

The issue is manifesting because the otherwise empty indicator has a margin,
which is adding more space than expected before the following element.

closes odoo/odoo#62172

X-original-commit: 4e0e8a415ae2175cd68e514cff33b2bffeb99db7
Signed-off-by: Alexandre Kühn (aku) <aku@odoo.com>

addons/mail/static/src/components/message/message.xml

@@ -76,7 +76,7 @@
                             <div class="o_Message_date o_Message_headerDate" t-att-class="{ 'o-message-selected': props.isSelected }" t-att-title="datetime">
                                 - <t t-esc="message.dateFromNow"/>
                             </div>
-                            <t t-if="message.isCurrentPartnerAuthor and threadView and threadView.thread">
+                            <t t-if="message.isCurrentPartnerAuthor and threadView and threadView.thread and threadView.thread.hasSeenIndicators">
                                 <MessageSeenIndicator class="o_Message_seenIndicator" messageLocalId="message.localId" threadLocalId="threadView.thread.localId"/>
                             </t>
                             <t t-if="threadView and message.originThread and message.originThread !== threadView.thread">

addons/mail/static/src/components/message/message_tests.js

@@ -343,6 +343,7 @@ QUnit.test("'channel_fetch' notification received is correctly handled", async f
         display_name: "Demo User",
     });
     const thread = this.env.models['mail.thread'].create({
+        channel_type: 'chat',
         id: 11,
         members: [
             [['link', currentPartner]],
@@ -404,6 +405,7 @@ QUnit.test("'channel_seen' notification received is correctly handled", async fu
         display_name: "Demo User",
     });
     const thread = this.env.models['mail.thread'].create({
+        channel_type: 'chat',
         id: 11,
         members: [
             [['link', currentPartner]],
@@ -464,6 +466,7 @@ QUnit.test("'channel_fetch' notification then 'channel_seen' received  are corre
         display_name: "Demo User",
     });
     const thread = this.env.models['mail.thread'].create({
+        channel_type: 'chat',
         id: 11,
         members: [
             [['link', currentPartner]],
@@ -541,6 +544,7 @@ QUnit.test('do not show messaging seen indicator if not authored by me', async f
         display_name: "Demo User"
     });
     const thread = this.env.models['mail.thread'].create({
+        channel_type: 'chat',
         id: 11,
         partnerSeenInfos: [['create', [
             {
@@ -589,6 +593,7 @@ QUnit.test('do not show messaging seen indicator if before last seen by all mess
         display_name: "Demo User",
     });
     const thread = this.env.models['mail.thread'].create({
+        channel_type: 'chat',
         id: 11,
         messageSeenIndicators: [['insert', {
             channelId: 11,
@@ -654,6 +659,7 @@ QUnit.test('only show messaging seen indicator if authored by me, after last see
         display_name: "Demo User"
     });
     const thread = this.env.models['mail.thread'].create({
+        channel_type: 'chat',
         id: 11,
         partnerSeenInfos: [['create', [
             {