RFR: 8261336: IGV: enhance default filters [v2]

[Roberto Castañeda Lozano]

On Tue, 16 Feb 2021 10:33:10 GMT, Tobias Hartmann <thartmann at openjdk.org> wrote:

>> Roberto Castañeda Lozano has updated the pull request incrementally with five additional commits since the last revision:
>> 
>>  - Rewrite 'Show control flow only' filter using categories
>>  - Add leading underscore field
>>  - Move assertion to a default switch case
>>  - Indent switch statements
>>  - Use a scoped enum for type categories (as per the HotSpot style guide)
>
> This is awesome. Thanks a lot for taking the time to improve the IGV. Looks good to me!

Thanks Christian and Tobias for reviewing!

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PR: https://git.openjdk.java.net/jdk/pull/2499