RFR: 7031: Build a constant pool explorer page [v2]

[Henrik Dafgård]

On Fri, 2 Apr 2021 07:50:40 GMT, Jean-Philippe Bempel <github.com+4610701+jpbempel at openjdk.org> wrote:

>> Add under Recording a new Page for ConstantPools
>> Help to visualize what's inside constant pools part of a JFR recording
>> 
>> ![JMC_ConstantPoolsPage](https://user-images.githubusercontent.com/4610701/110855759-13569700-82b7-11eb-9981-deb0b8b5e185.png)
>> 
>> *Draft*
>> - Icon is copy/paste from recording. If you have idea about how to replace it...
>> - I have limited the tables to the search toolbar, visible by default
>> - a hidden count column for constant values helps you find out when you duplicates constant (for OldObjectSample event issue) should not be useful otherwise
>
> Jean-Philippe Bempel has updated the pull request incrementally with one additional commit since the last revision:
> 
>   load state for SASH

Marked as reviewed by hdafgard (Reviewer).

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PR: https://git.openjdk.java.net/jmc/pull/228