Upgrade rjsf to >=5.18.6 and remove performance workaround

[helen-m-lin]

Is your feature request related to a problem? Please describe. Previously we added a custom omitExtraDataOnBlur event handler as workaround for an RJSF omitExtraData bug (in PR #171). I contributed a fix to rjsf and it was released in v5.18.6.

Describe the solution you'd like

• Update RJSF version to >= 5.18.6
• Remove omitExtraDataOnBlur workaround
• Check performance issues are further improved
• Check update rjsf version does not break anything

Describe alternatives you've considered A clear and concise description of any alternative solutions or features you've considered.

Additional context Add any other context or screenshots about the feature request here.

[micahwoodard]

@helen-m-lin do we want to update to the most recent release 5.19.4 or stick with 5.18.6?

[helen-m-lin]

It'd be nice to try out both if you have time. Otherwise, just update to 5.18.6.