[FIX] mail: use right chatter field for chatter prop value

task-2319706

closes odoo/odoo#56108

X-original-commit: 8955626b0f08be7364e715f0fdb91ef72a31f757
Signed-off-by: Alexandre Kühn (aku) <aku@odoo.com>

addons/mail/static/src/js/basic_view.js

@@ -17,7 +17,7 @@ BasicView.include({
             hasRecordReloadOnAttachmentsChanged: post_refresh === 'always',
             hasRecordReloadOnMessagePosted: !!post_refresh,
             hasRecordReloadOnFollowersUpdate: !!followers_post_refresh,
-            isActivityBoxVisible: this._getFieldOption('message_ids', 'open_attachments', false)
+            isAttachmentBoxVisible: this._getFieldOption('message_ids', 'open_attachments', false)
                                     || this._getFieldOption('message_follower_ids', 'open_attachments', false),
         };
         const fieldsInfo = this.fieldsInfo[this.viewType];

addons/mail/static/src/widgets/form_renderer/form_renderer.js

@@ -103,7 +103,7 @@ FormRenderer.include({
             hasActivities: this.chatterFields.hasActivityIds,
             hasFollowers: this.chatterFields.hasMessageFollowerIds,
             hasThread: this.chatterFields.hasMessageIds,
-            isAttachmentBoxVisible: this.chatterFields.isActivityBoxVisible,
+            isAttachmentBoxVisible: this.chatterFields.isAttachmentBoxVisible,
             messageIds,
             threadAttachmentCount,
             threadId: this.state.res_id,