Unexpected behavior when clearing search after viewing a produced message

[derek1ee]

1. Prepare a JSON payload containing message to be produced.
2. Pick a topic, produce the message to that topic.
3. On the notification, select "view message" to open topic message viewer.
4. Observe the message is filtered/shown.
5. Select the "X" on the search textbox to clear it.

Expected:

1. Should now see all messages.

Actual:

1. Still just see that single message.

Observation:
It looks like when opening the topic message viewer, both a search AND filter is applied. So that when I clear the search, the filter is still applied (but not very noticable). And if I click on an empty column, the filter will be cleared and all message will be shown.

I think we should consider:

1. Fix Can't search by timestamp value in topic message viewer #927
2. When opening the tab, open pass in timestamp of the generated message, apply no additional filter
3. Separately explore better UI for when histogram filter is applied and how to clear it