fix histogram extended bounds persisting after deselection

[michaelcheng924]

UPDATE: WIP

Might need to fix some tests, but this code fixes the problem. Fixes #5898.

TODO:

• check/fix tests

Now:

Before:

[elasticsearch-release]

Jenkins standing by to test this. If you aren't a maintainer, you can ignore this comment. Someone with commit access, please review this and clear it for Jenkins to run; then say 'jenkins, test it'.

[michaelcheng924]

Fixed and added a test. The extended_bounds entered is preserved if the user re-checks the checkbox, so if they check it again, their previously entered values are still there. But now, when they uncheck the checkbox, the chart no longer displays the extended bounds, which my additional test covers.

[epixa]

jenkins, test it

[epixa]

@michaelcheng429 I modified your original post to use the format Fixes #XYZ so github automatically closes the corresponding issue on merge.

[epixa]

This needs to be rebased on master or have master merged into it.

[michaelcheng924]

Rebased on master @epixa

[epixa]

jenkins, test it

[elasticsearch-release]

Jenkins standing by to test this. If you aren't a maintainer, you can ignore this comment. Someone with commit access, please review this and clear it for Jenkins to run; then say 'jenkins, test it'.

[rashidkpc]

LGTM