Fix series labels inside area and line chart tooltips
What does this MR do?
Fixes the way longer metric labels are displayed inside of the tooltips of area and line charts.
This is the implementation MR for #236012 (closed)
Screenshots
| Before | After |
|---|---|
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Video
Screen_Recording_2020-08-13_at_21.12.44
Link for testing the old behaviour
https://gitlab.com/gitlab-org/monitor/monitor-sandbox/-/metrics/long_tooltip_labels.yml
Does this MR meet the acceptance criteria?
Conformity
Edited by Andrei Stoicescu