RFR: 8265433: IGV: add graph tooltips with properties [v3]

[Koichi Sakata]

On Fri, 5 Aug 2022 11:22:46 GMT, Tobias Holenstein <tholenstein at openjdk.org> wrote:

>> Koichi Sakata has updated the pull request incrementally with three additional commits since the last revision:
>> 
>>  - Escape strings in tooltip
>>  - Undo an unintentional change
>>  - Discard changes for Outline window
>
> Nice work! @jyukutyo thanks for working on this.
> 
> Look good to me. My only suggestion is about the spacing of the text (see comment)
> 
> Note: I am not a Reviewer

@tobiasholenstein Thank you for your suggestion! I've reflected it. That made tooltip more readable.

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PR: https://git.openjdk.org/jdk/pull/9740