RFR: 6691: The root of the flame graph could be improved

[Miroslav Wengner]

On Wed, 25 Mar 2020 18:39:26 GMT, Marcus Hirt <hirt at openjdk.org> wrote:

>> https://bugs.openjdk.java.net/browse/JMC-6691
>
> I think it would be great to get the plural form of "event" in when there is more than one, and the singularis form of
> "types" in when there is only one event type selected.

plural and singular forms update for : event/s, type/s
root node title update:
event/s and type/s
![image](https://user-images.githubusercontent.com/1956942/77638459-7ee50e80-6f57-11ea-882c-65786905844c.png)

![image](https://user-images.githubusercontent.com/1956942/77638349-4ba27f80-6f57-11ea-9e66-40bac8f6267c.png)

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PR: https://git.openjdk.java.net/jmc/pull/67