Apply highlights in chat even when notify is none

When notify is none, the buffer should not appear in the hotlist even
for a highlight. However, when switching to the buffer, we want the line
to be highlighted. To achieve this use a tag added to highlight_tags on
the buffer.

1 files changed, 4 insertions, 1 deletions

diff --git a/slack/slack_message.py b/slack/slack_message.py
index c51c8b4..ddb2ceb 100644
--- a/slack/slack_message.py
+++ b/slack/slack_message.py
@@ -383,7 +383,10 @@ class SlackMessage:
         elif priority == MessagePriority.LOW:
             return None
         elif priority == MessagePriority.NONE:
-            return "notify_none"
+            tags = ["notify_none"]
+            if self.should_highlight(False):
+                tags.append(shared.highlight_tag)
+            return ",".join(tags)
         else:
             assert_never(priority)