[TSVB] Metric count is depicted as - instead of 0

[stratoula]

Kibana version:
master

Describe the bug:
I have a TSVB metric viz with Count aggregation. When there is no data, I want the value to be displayed as zero and not as dash.

Now the metric is displayed with a dash

while the timeseries is displayed with zero

I want Count to display zero and not a dash as it is confusing for our users. This is what we had agreed here #90861 (comment)

[elasticmachine]

Pinging @elastic/kibana-app (Team:KibanaApp)

[chenslrv]

@stratoula This confusing behavior also happens with Cardinality aggregation

[wylieconlon]

@stratoula It looks like this is a regression, the change that I implemented was showing 0 for count and - for empty series.

[stratoula]

Yes, @wylieconlon I agree. I am pretty sure that I had tested all scenarios back then

[dej611]

Reopen this as the bug it still available on 7.14.0-8eba2f5f.
I could not reproduce in master though.

[stratoula]

I am creating a backport for 7.14 #104634
Let's check it on thenext BC and close it then :)

[stratoula]

I just tested it on the new BC (I created a new 7.14 instance) and it has been resolved. I am closing it.